def __init__(self):
self.train_set = "train_set.json"
self.cleaning = TextCleaning()
self.vocabulary = "vocabulary.json"
self.voc_data = {}
def __init__(self):
self.vocab = "vocabulary.json"
self.cleaning = TextCleaning()
self.words = VocabularyCreator()
class VocabularyCreator:
"""Class for creating vocabulary of spam and non-spam messages"""
def __init__(self):
self.train_set = "train_set.json"
self.cleaning = TextCleaning()
self.vocabulary = "vocabulary.json"
self.voc_data = {}
def compute_proba(self, data, word_freq, total):
'''
Description: calcul la probabilité de chaque mot du dictionnaire basé sur
sa fréquence d'occurence
Sortie: le dictionnaire des probabilité pour chaque mot
'''
proba_dict = {}
for wd in data:
if data[wd] < 1 or data[wd] > 4:
continue
elif data[w] == word_freq:
proba_dict[wd] = data[wd] / total
return proba_dict
def create_vocab(self, word_freq, mode):
'''
Description: fonction pour creer le vocabulaire des mots presents
dans les e-mails spam et ham et le sauvegarder dans le fichier
vocabulary.json selon le format specifie dans la description de lab
Sortie: bool, 'True' pour succes, 'False' dans le cas de failure.
'''
print("Creating vocabulary")
dataset = self.load_dict()
occ_spam_sub = {}
occ_spam_bod = {}
occ_ham_sub = {}
occ_ham_bod = {}
total_occ_spam_sub = 0
total_occ_ham_sub = 0
total_occ_spam_bod = 0
total_occ_ham_bod = 0
email_count = len(dataset["dataset"])
i = 0
# Analyze each email
for email in dataset["dataset"]:
i += 1
print("\rEmail " + str(i) + "/" + str(email_count), end="")
# Get data
data = email["mail"]
subject = data["Subject"]
body = data["Body"]
is_spam = False
# Update the number of spams / hams
if data["Spam"] == "true":
is_spam = True
# Analyze the subject
subject = self.cleaning.clean_text(subject, mode)
if is_spam:
for wd in subject:
total_occ_spam_sub += 1
# Add the word to the dictionary or update its occurence count
if wd not in occ_spam_sub:
occ_spam_sub[wd] = 1
else:
occ_spam_sub[wd] += 1
else:
for wd in subject:
total_occ_ham_sub += 1
# Add the word to the dictionary or update its occurence count
if wd not in occ_ham_sub:
occ_ham_sub[wd] = 1
else:
occ_ham_sub[wd] += 1
# Analyze the body
body = self.cleaning.clean_text(body, mode)
if is_spam:
for wd in body:
total_occ_spam_bod += 1
# Add the word to the dictionary or update its occurence count
if wd not in occ_spam_bod:
occ_spam_bod[wd] = 1
else:
occ_spam_bod[wd] += 1
else:
for wd in body:
total_occ_ham_bod += 1
# Add the word to the dictionary or update its occurence count
if wd not in occ_ham_bod:
occ_ham_bod[wd] = 1
else:
occ_ham_bod[wd] += 1
# Create the data dictionary
p_sub_spam = self.compute_proba(occ_spam_sub, word_freq,
total_occ_spam_sub)
p_sub_ham = self.compute_proba(occ_ham_sub, word_freq,
total_occ_ham_sub)
p_body_spam = self.compute_proba(occ_spam_bod, word_freq,
total_occ_spam_bod)
p_body_ham = self.compute_proba(occ_ham_bod, word_freq,
total_occ_ham_bod)
self.voc_data = {
"p_sub_spam": p_sub_spam,
"p_sub_ham": p_sub_ham,
"p_body_spam": p_body_spam,
"p_body_ham": p_body_ham
}
# Save data
with open(self.vocabulary, "w") as outfile:
json.dump(self.voc_data, outfile, indent=4)
print("\n")
return True
def load_dict(self):
with open(self.train_set) as json_data:
data_dict = json.load(json_data)
return data_dict
def write_data_to_vocab_file(self, vocab):
try:
with open(self.vocabulary, "w") as outfile:
json.dump(vocab, outfile)
print("Vocab created")
return True
except:
return False
def clean_text(self, text, mode):
return self.cleaning.clean_text(text, mode)
def __init__(self):
self.vocab = "vocabulary.json"
self.cleaning = TextCleaning()
class EmailAnalyzer:
"""Classe pour classifier les e-mails comme spam ou non spam (ham)"""
def __init__(self):
self.vocab = "vocabulary.json"
self.cleaning = TextCleaning()
self.words = VocabularyCreator()
@staticmethod
def is_spam_function_one(is_msg_spam, user_historic_in_days, user_trust, user_group_trust):
p = is_msg_spam
h = user_historic_in_days < 30
t1 = user_trust < 60
t2 = user_group_trust < 70
t3 = user_trust > 75
result = p and (h and t1 or t2) or h and t2 and not t3
return result
@staticmethod
def is_spam_function_two(is_msg_spam, user_trust, user_group_trust):
p = is_msg_spam
t2 = user_group_trust < 70
t3 = user_trust > 75
result = p or not t3 and t2
return result
def is_spam(self, subject_orig, body_orig, isLogEstimation, isLogCombination, k):
'''
Description: fonction pour verifier si e-mail est spam ou ham,
en calculant les probabilites d'etre spam et ham,
donnee le sujet et le texte d'email.
Sortie: 'True' - si l'email est spam, 'False' - si email est ham.
'''
# nombre de mots spam ou ham / nombre de mots total dans les emails
pSpam = self.calculate_spam_divided_by_email()
pHam = self.calculate_ham_divided_by_email()
if (isLogEstimation):
pSpamSubject, pHamSubject = self.subject_spam_ham_log_prob(subject_orig, pSpam, pHam)
pSpamBody, pHamBody = self.subject_spam_ham_log_prob(body_orig, pSpam, pHam)
estimationpSpamSubject = math.log10(pSpam) + pSpamSubject
estimationpHamSubject = math.log10(pHam) + pHamSubject
estimationpSpamBody = math.log10(pSpam) + pSpamBody
estimationpHamBody = math.log10(pHam) + pHamBody
else:
pSpamSubject, pHamSubject = self.subject_spam_ham_prob(subject_orig)
pSpamBody, pHamBody = self.spam_ham_body_prob(body_orig)
estimationpSpamSubject = pSpam * pSpamSubject
estimationpHamSubject = pHam * pHamSubject
estimationpSpamBody = pSpam * pSpamBody
estimationpHamBody = pHam * pHamBody
if (isLogCombination):
# s'assurer que l'estimation est strictement plus grand que 0 afin de pouvoir faire le logarithme
# seul ceux qui sont strictement positif auront appliquer la fonction math.log10
if (estimationpSpamSubject > 0):
estimationpSpamSubject = math.log10(estimationpSpamSubject)
if (estimationpHamSubject > 0):
estimationpHamSubject = math.log10(estimationpHamSubject)
if (estimationpSpamBody > 0):
estimationpSpamBody = math.log10(estimationpSpamBody)
if (estimationpHamBody > 0):
estimationpHamBody = math.log10(estimationpHamBody)
# s'assurer que la valeur de k est entre 0 et 1
# si elle est plus grand que 1, le rendre en une valeur entre 0 et 1
if (k > 1):
k = k / math.pow(10, len(str(k)))
elif (k < 0):
k = 0
# la formule de combinaison de prob est pareil pour les 2 options
# a l'exception de la valeur des parametres d'estimation qui auront applique le logarithme si approprie
combinationpSpam = k * estimationpSpamSubject + (1 - k) * estimationpSpamBody
combinationpHam = k * estimationpHamSubject + (1 - k) * estimationpHamBody
return combinationpSpam > combinationpHam
def subject_spam_ham_log_prob(self, subject, pSpam, pHam):
vocabulary = self.load_dict()
pSpamSubject = pSpam
pHamSubject = pHam
# calcul de probabilite de spam ou ham dans le body
subject = self.clean_text(subject)
for word in subject:
if word in dict(vocabulary['spam_body']):
pSpamSubject += dict(vocabulary['spam_body'])[word]
if word in dict(vocabulary['ham_body']):
pHamSubject += dict(vocabulary['ham_body'])[word]
# logarithme de pSpamBody et pHamBody
pHamSubject = math.log10(pHamSubject)
pSpamSubject = math.log10(pSpamSubject)
if pSpam == pSpamSubject:
pSpamBody = 0
elif pHam == pHamSubject:
pHamBody = 0
return pSpamBody, pHamBody
def spam_ham_body_log_prob(self, body, pSpam, pHam):
vocabulary = self.load_dict()
pSpamBody = pSpam
pHamBody = pHam
# calcul de probabilite de spam ou ham dans le body
body = self.clean_text(body)
for word in body:
if word in dict(vocabulary['spam_body']):
pSpamBody += dict(vocabulary['spam_body'])[word]
if word in dict(vocabulary['ham_body']):
pHamBody += dict(vocabulary['ham_body'])[word]
# logarithme de pSpamBody et pHamBody
pHamBody = math.log10(pHamBody)
pSpamBody = math.log10(pSpamBody)
if pSpam == pSpamBody:
pSpamBody = 0
elif pHam == pHamBody:
pHamBody = 0
return pSpamBody, pHamBody
def spam_ham_body_prob(self, body):
'''
Description: fonction pour calculer la probabilite
que le 'body' d'email est spam ou ham.
Sortie: probabilite que email body est spam, probabilite
que email body est ham.
'''
vocabulary = self.load_dict()
# nombre de mots spam ou ham / nombre de mots total dans les emails
pSpam = self.calculate_spam_divided_by_email()
pHam = self.calculate_ham_divided_by_email()
pSpamBody = pSpam
pHamBody = pHam
# calcul de probabilite de spam ou ham dans le body
body = self.clean_text(body)
for word in body:
if word in dict(vocabulary['spam_body']):
pSpamBody *= dict(vocabulary['spam_body'])[word]
if word in dict(vocabulary['ham_body']):
pHamBody *= dict(vocabulary['ham_body'])[word]
if pSpam == pSpamBody:
pSpamBody = 0
elif pHam == pHamBody:
pHamBody = 0
return pSpamBody, pHamBody
def subject_spam_ham_prob(self, subject):
'''
Description: fonction pour calculer la probabilite
que le sujet d'email est spam ou ham.
Sortie: probabilite que email subject est spam, probabilite
que email subject est ham.
'''
vocabulary = self.load_dict()
# nombre de mots spam ou ham / nombre de mots total dans les emails
pSpam = self.calculate_spam_divided_by_email()
pHam = self.calculate_ham_divided_by_email()
pSpamSubject = pSpam
pHamSubject = pHam
# calcul de probabilite de spam ou ham dans le sujet
subject = self.clean_text(subject)
spam_dict = dict(vocabulary['spam_sub'])
ham_dict = dict(vocabulary['ham_sub'])
for word in subject:
if word in spam_dict:
pSpamSubject *= spam_dict[word]
if word in ham_dict:
pHamSubject *= ham_dict[word]
if pSpam == pSpamSubject:
pSpamSubject = 0
elif pHam == pHamSubject:
pHamSubject = 0
return pSpamSubject, pHamSubject
def calculate_spam_divided_by_email(self): # pragma: no cover
return self.words.count_spam() / self.words.count_emails()
def calculate_ham_divided_by_email(self): # pragma: no cover
return self.words.count_ham() / self.words.count_emails()
def load_dict(self): # pragma: no cover
with open(self.vocab) as file:
vocabulary = json.load(file)
return vocabulary
def clean_text(self, text): # pragma: no cover
return self.cleaning.clean_text(text, 0)
class EmailAnalyzer:
"""Classe pour classifier les e-mails comme spam ou non spam (ham)"""
def __init__(self):
self.vocab = "vocabulary.json"
self.cleaning = TextCleaning()
self.words = VocabularyCreator()
def is_spam(self, subject_orig, body_orig):
'''
Description: fonction pour verifier si e-mail est spam ou ham,
en calculant les probabilites d'etre spam et ham,
donnee le sujet et le texte d'email.
Sortie: 'True' - si l'email est spam, 'False' - si email est ham.
'''
pSpamSubject, pHamSubject = self.subject_spam_ham_prob(subject_orig)
pSpamBody, pHamBody = self.spam_ham_body_prob(body_orig)
# calcul de pSpam et pHam en faisant la moyenne
pSpam = (pSpamSubject + pSpamBody) / 2
pHam = (pHamSubject + pHamBody) / 2
return pSpam > pHam
def spam_ham_body_prob(self, body):
'''
Description: fonction pour calculer la probabilite
que le 'body' d'email est spam ou ham.
Sortie: probabilite que email body est spam, probabilite
que email body est ham.
'''
vocabulary = self.load_dict()
# nombre de mots spam ou ham / nombre de mots total dans les emails
pSpam = self.calculate_spam_divided_by_email()
pHam = self.calculate_ham_divided_by_email()
pSpamBody = pSpam
pHamBody = pHam
# calcul de probabilite de spam ou ham dans le body
body = self.clean_text(body)
for word in body:
if word in dict(vocabulary['spam_body']):
pSpamBody *= dict(vocabulary['spam_body'])[word]
if word in dict(vocabulary['ham_body']):
pHamBody *= dict(vocabulary['ham_body'])[word]
if pSpam == pSpamBody:
pSpamBody = 0
elif pHam == pHamBody:
pHamBody = 0
return pSpamBody, pHamBody
def subject_spam_ham_prob(self, subject):
'''
Description: fonction pour calculer la probabilite
que le sujet d'email est spam ou ham.
Sortie: probabilite que email subject est spam, probabilite
que email subject est ham.
'''
vocabulary = self.load_dict()
# nombre de mots spam ou ham / nombre de mots total dans les emails
pSpam = self.calculate_spam_divided_by_email()
pHam = self.calculate_ham_divided_by_email()
pSpamSubject = pSpam
pHamSubject = pHam
# calcul de probabilite de spam ou ham dans le sujet
subject = self.clean_text(subject)
spam_dict = dict(vocabulary['spam_sub'])
ham_dict = dict(vocabulary['ham_sub'])
for word in subject:
if word in spam_dict:
pSpamSubject *= spam_dict[word]
if word in ham_dict:
pHamSubject *= ham_dict[word]
if pSpam == pSpamSubject:
pSpamSubject = 0
elif pHam == pHamSubject:
pHamSubject = 0
return pSpamSubject, pHamSubject
def calculate_spam_divided_by_email(self): # pragma: no cover
return self.words.count_spam() / self.words.count_emails()
def calculate_ham_divided_by_email(self): # pragma: no cover
return self.words.count_ham() / self.words.count_emails()
def load_dict(self): # pragma: no cover
with open(self.vocab) as file:
vocabulary = json.load(file)
return vocabulary
def clean_text(self, text): # pragma: no cover
return self.cleaning.clean_text(text)
class EmailAnalyzer:
"""Classe pour classifier les e-mails comme spam ou non spam (ham)"""
def __init__(self):
self.vocab = "vocabulary.json"
self.cleaning = TextCleaning()
def clean_text(self, text, mode): # pragma: no cover
return self.cleaning.clean_text(text, mode)
def load_vocab(self): # pragma: no cover
with open(self.vocab) as json_data:
vocab = json.load(json_data)
return vocab
def is_spam_with_params(self, subject_orig, body_orig,
is_normal_estimation, is_normal_combination,
cleaning_mode, k):
'''
Description: fonction pour verifier si e-mail est spam ou ham,
en calculant les probabilites d'etre spam et ham,
donnee le sujet et le texte d'email.
Sortie: 'True' - si l'email est spam, 'False' - si email est ham.
'''
if is_normal_estimation:
prob_message_subject = self.subject_spam_ham_prob(
subject_orig, cleaning_mode)
prob_message_body = self.body_spam_ham_prob(
body_orig, cleaning_mode)
subject_spam = prob_message_subject[0]
body_spam = prob_message_body[0]
subject_ham = prob_message_subject[1]
body_ham = prob_message_body[1]
else:
prob_message_subject = self.subject_spam_ham_prob_log(
subject_orig, cleaning_mode)
prob_message_body = self.body_spam_ham_prob_log(
subject_orig, cleaning_mode)
subject_spam = math.pow(prob_message_subject[0], 10)
body_spam = math.pow(prob_message_body[0], 10)
subject_ham = math.pow(prob_message_subject[1], 10)
body_ham = math.pow(prob_message_body[1], 10)
if is_normal_combination:
prob_message_spam = k * subject_spam + (1 - k) * body_spam
prob_message_ham = k * subject_ham + (1 - k) * body_ham
else:
# il faut traiter les cas ou x dans log(x) est egal a 0 ou tres petit
if not subject_spam <= 0:
if not body_spam <= 0:
prob_message_spam = k * math.log10(subject_spam) + (
1 - k) * math.log10(body_spam)
else:
prob_message_spam = k * math.log10(subject_spam) + (
1 - k) * body_spam
elif not body_spam <= 0:
prob_message_spam = k * subject_spam + (
1 - k) * math.log10(body_spam)
else:
prob_message_spam = k * subject_spam + (1 - k) * body_spam
if not subject_ham <= 0:
if not body_ham <= 0:
prob_message_ham = k * math.log10(subject_ham) + (
1 - k) * math.log10(body_ham)
else:
prob_message_ham = math.log10(subject_ham) + (1 -
k) * body_ham
elif body_ham <= 0:
prob_message_ham = k * subject_ham + (1 -
k) * math.log10(body_ham)
else:
prob_message_ham = subject_ham + (1 - k) * body_ham
max_prob = max(prob_message_spam, prob_message_ham)
return True if max_prob == prob_message_spam else False
def is_spam(self, subject_orig, body_orig):
'''
Description: fonction pour verifier si e-mail est spam ou ham,
en calculant les probabilites d'etre spam et ham,
donnee le sujet et le texte d'email.
Sortie: 'True' - si l'email est spam, 'False' - si email est ham.
'''
prob_message_subject = self.subject_spam_ham_prob(subject_orig)
prob_message_body = self.body_spam_ham_prob(body_orig)
# equation 7 de l'enonce
prob_message_spam = (2 / 10 * prob_message_subject[0]) + (
8 / 10 * prob_message_body[0])
prob_message_ham = (4 / 10 * prob_message_subject[1]) + (
6 / 10 * prob_message_body[1])
#equation 3 de l'enonce
max_prob = max(prob_message_spam, prob_message_ham)
return True if max_prob == prob_message_spam else False
def total_emails(self, file):
'''
Description: fonction qui calcule le nombre de courriel
dans un fichier quelconque.
Sortie: int; il s'agit du nombre total de messages
'''
with open(file) as f:
input_file = json.load(f)
email = input_file["dataset"]
total = len(email)
return total
def probability_email_type(self, file):
'''
Description: fonction qui calcule la probabilite
qu'un message soit spam ou ham dans un fichier
Sortie: int, int: P(spam), P(ham)
'''
spam_counter = 0
ham_counter = 0
with open(file) as f:
input_file = json.load(f)
for email in input_file["dataset"]:
individual_email = email["mail"]
spam_bool = individual_email["Spam"]
if spam_bool == "true":
spam_counter += 1
else:
ham_counter += 1
total = self.total_emails(file)
# equation 5: P(spam) = nb de messages spam/nb total de messages
return spam_counter / total, ham_counter / total
def body_spam_ham_prob(self, body, cleaning_mode):
'''
Description: fonction pour calculer la probabilite
que le 'body' d'email est spam ou ham.
Sortie: probabilite que email body est spam, probabilite
que email body est ham.
'''
body_spam_prob = 1
body_ham_prob = 1
probability_spam_ham = self.probability_email_type('train-emails.json')
prob_spam = probability_spam_ham[0]
prob_ham = probability_spam_ham[1]
with open(self.vocab) as f:
input_file = json.load(f)
# clean_body = self.cleaning.clean_text(body)
clean_body = self.clean_text(body, cleaning_mode)
num_words_spam_body = len(input_file["spam_body"])
num_words_ham_body = len(input_file["ham_body"])
for body_word in clean_body:
if body_word in input_file["spam_body"]:
body_spam_prob *= input_file["spam_body"][body_word]
elif body_word in input_file["ham_body"] or body_word in input_file[
"ham_sub"] or body_word in input_file["spam_sub"]:
body_spam_prob *= 1 / (num_words_spam_body + 1)
if body_word in input_file["ham_body"]:
body_ham_prob *= input_file["ham_body"][body_word]
elif body_word in input_file[
"spam_body"] or body_word in input_file[
"ham_sub"] or body_word in input_file["spam_sub"]:
body_ham_prob *= 1 / (num_words_ham_body + 1)
'''
for word in input_file["spam_body"]:
if body_word == word:
body_spam_prob *= input_file["spam_body"][word]
for word in input_file["ham_body"]:
if body_word == word:
body_ham_prob *= input_file["ham_body"][word]
'''
return prob_spam * body_spam_prob, prob_ham * body_ham_prob
def body_spam_ham_prob_log(self, body, cleaning_mode):
'''
Description: fonction pour calculer la probabilite
que le 'body' d'email est spam ou ham.
Sortie: probabilite que email body est spam, probabilite
que email body est ham.
'''
body_spam_prob = 0
body_ham_prob = 0
probability_spam_ham = self.probability_email_type('train-emails.json')
if probability_spam_ham[0] > 0:
prob_spam = math.log10(probability_spam_ham[0])
else:
prob_spam = probability_spam_ham[0]
if probability_spam_ham[1] > 0:
prob_ham = math.log10(probability_spam_ham[1])
else:
prob_ham = probability_spam_ham[1]
with open(self.vocab) as f:
input_file = json.load(f)
# clean_body = self.cleaning.clean_text(body)
clean_body = self.clean_text(body, cleaning_mode)
num_words_spam_body = len(input_file["spam_body"])
num_words_ham_body = len(input_file["ham_body"])
for body_word in clean_body:
if body_word in input_file["spam_body"]:
if input_file["spam_body"][body_word] > 0:
# pas certaine de comment modifier cette partie, pour l'instant += math.log10()()
body_spam_prob += math.log10(
input_file["spam_body"][body_word])
else:
body_spam_prob += input_file["spam_body"][body_word]
elif body_word in input_file["ham_body"] or body_word in input_file[
"ham_sub"] or body_word in input_file["spam_sub"]:
body_spam_prob += math.log10(1 / (num_words_spam_body + 1))
if body_word in input_file["ham_body"]:
if input_file["ham_body"][body_word] > 0:
body_ham_prob += math.log10(
input_file["ham_body"][body_word])
else:
body_ham_prob += input_file["ham_body"][body_word]
elif body_word in input_file[
"spam_body"] or body_word in input_file[
"ham_sub"] or body_word in input_file["spam_sub"]:
#pareil
body_ham_prob += math.log10(1 / (num_words_ham_body + 1))
'''
for word in input_file["spam_body"]:
if body_word == word:
body_spam_prob *= input_file["spam_body"][word]
for word in input_file["ham_body"]:
if body_word == word:
body_ham_prob *= input_file["ham_body"][word]
'''
return prob_spam + body_spam_prob, prob_ham + body_ham_prob
def subject_spam_ham_prob(self, subject, cleaning_mode):
'''
Description: fonction pour calculer la probabilite
que le sujet d'email est spam ou ham.
Sortie: probabilite que email subject est spam, probabilite
que email subject est ham.
'''
sub_spam_prob = 1
sub_ham_prob = 1
probability_spam_ham = self.probability_email_type('train-emails.json')
prob_spam = probability_spam_ham[0]
prob_ham = probability_spam_ham[1]
with open(self.vocab) as f:
input_file = json.load(f)
# clean_body = self.cleaning.clean_text(body)
clean_sub = self.clean_text(subject, cleaning_mode)
num_words_spam_sub = len(input_file["spam_sub"])
num_words_ham_sub = len(input_file["ham_sub"])
for subject_word in clean_sub:
if subject_word in input_file["spam_sub"]:
sub_spam_prob *= input_file["spam_sub"][subject_word]
elif subject_word in input_file[
"spam_body"] or subject_word in input_file[
"ham_sub"] or subject_word in input_file["spam_sub"]:
sub_spam_prob *= 1 / (num_words_spam_sub + 1)
if subject_word in input_file["ham_sub"]:
sub_ham_prob *= input_file["ham_sub"][subject_word]
elif subject_word in input_file[
"spam_body"] or subject_word in input_file[
"ham_body"] or subject_word in input_file["spam_sub"]:
sub_ham_prob *= 1 / (num_words_ham_sub + 1)
'''
for word in input_file["spam_sub"]:
if subject_word == word:
sub_spam_prob *= input_file["spam_sub"][word]
for word in input_file["ham_sub"]:
if subject_word == word:
sub_ham_prob *= input_file["ham_sub"][word]
'''
return prob_spam * sub_spam_prob, prob_ham * sub_ham_prob
def subject_spam_ham_prob_log(self, subject, cleaning_mode):
'''
Description: fonction pour calculer la probabilite
que le sujet d'email est spam ou ham.
Sortie: probabilite que email subject est spam, probabilite
que email subject est ham.
'''
sub_spam_prob = 0
sub_ham_prob = 0
probability_spam_ham = self.probability_email_type('train-emails.json')
prob_spam = math.log10(probability_spam_ham[0])
prob_ham = math.log10(probability_spam_ham[1])
with open(self.vocab) as f:
input_file = json.load(f)
# clean_body = self.cleaning.clean_text(body)
clean_sub = self.clean_text(subject, cleaning_mode)
num_words_spam_sub = len(input_file["spam_sub"])
num_words_ham_sub = len(input_file["ham_sub"])
for subject_word in clean_sub:
if subject_word in input_file["spam_sub"]:
if input_file["spam_sub"][subject_word] > 0:
sub_spam_prob += math.log10(
input_file["spam_sub"][subject_word])
else:
sub_spam_prob += (input_file["spam_sub"][subject_word])
#pas certaine de comment modifier cette partie, pour l'instant += math.log10()()
elif subject_word in input_file[
"spam_body"] or subject_word in input_file[
"ham_sub"] or subject_word in input_file["spam_sub"]:
sub_spam_prob += math.log10(1 / (num_words_spam_sub + 1))
if subject_word in input_file["ham_sub"]:
if input_file["ham_sub"][subject_word] > 0:
sub_ham_prob += math.log10(
input_file["ham_sub"][subject_word])
else:
sub_ham_prob += input_file["ham_sub"][subject_word]
#pareil
elif subject_word in input_file[
"spam_body"] or subject_word in input_file[
"ham_body"] or subject_word in input_file["spam_sub"]:
sub_ham_prob += math.log10(1 / (num_words_ham_sub + 1))
return prob_spam + sub_spam_prob, prob_ham + sub_ham_prob
class VocabularyCreator:
"""Class for creating vocabulary of spam and non-spam messages"""
def __init__(self):
self.train_set = "800-mails.json"
self.cleaning = TextCleaning()
self.vocabulary = "vocabulary.json"
def create_vocab(self):
'''
Description: fonction pour creer le vocabulaire des mots presents
dans les e-mails spam et ham et le sauvegarder dans le fichier
vocabulary.json selon le format specifie dans la description de lab
Sortie: bool, 'True' pour succes, 'False' dans le cas de failure.
'''
try:
with open(self.train_set, "r") as read_file:
emails = json.load(read_file)
except:
print("ERROR IN READING FILE")
raise Exception
spamSubjects = []
hamSubjects = []
spamBodies = []
hamBodies = []
vocabulary = {
"spam_sub": {},
"ham_sub": {},
"spam_body": {},
"ham_body": {}
}
#ajout des sujets et des corps des emails de 800-mails.json dans le tableau respectif
for email in emails["dataset"]:
if email["mail"]["Spam"] == "true":
spamSubjects.extend(
self.cleaning.clean_text(email["mail"]["Subject"]))
spamBodies.extend(
self.cleaning.clean_text(email["mail"]["Body"]))
else:
hamSubjects.extend(
self.cleaning.clean_text(email["mail"]["Subject"]))
hamBodies.extend(
self.cleaning.clean_text(email["mail"]["Body"]))
spam_sub = list(dict.fromkeys(spamSubjects))
ham_sub = list(dict.fromkeys(hamSubjects))
spam_body = list(dict.fromkeys(spamBodies))
ham_body = list(dict.fromkeys(hamBodies))
#calcul des probabilites spam et ham pour chaque mots
for word in spam_sub:
vocabulary["spam_sub"][word] = spamSubjects.count(word) / len(
spamSubjects)
for word in ham_sub:
vocabulary["ham_sub"][word] = hamSubjects.count(word) / len(
hamSubjects)
for word in spam_body:
vocabulary["spam_body"][word] = spamBodies.count(word) / len(
spamBodies)
for word in ham_body:
vocabulary["ham_body"][word] = hamBodies.count(word) / len(
hamBodies)
try:
with open(self.vocabulary, "w") as write_file:
json.dump(vocabulary, write_file, indent=1)
return True
except:
return False
#fonction qui retourne le nombre de courriel spam
def count_spam(self):
with open(self.train_set) as read_file:
emails = json.load(read_file)
nSpams = 0
for email in emails["dataset"]:
if email["mail"]["Spam"] == "true":
nSpams += 1
return nSpams
#fonction qui retourne le nombre de courriel
def count_emails(self):
with open(self.train_set) as read_file:
emails = json.load(read_file)
return len(emails["dataset"])
#fonction qui retourne le nombre de courriel ham
def count_ham(self):
nHams = self.count_spam() - self.count_emails()
return nHams
def __init__(self):
self.train_set = "800-mails.json"
self.cleaning = TextCleaning()
self.vocabulary = "vocabulary.json"
class VocabularyCreator:
"""Class for creating vocabulary of spam and non-spam messages"""
def __init__(self):
self.train_set = "800-mails.json"
self.cleaning = TextCleaning()
self.vocabulary = "vocabulary.json"
def create_vocab(self, minWordFreq, clean_text_mode):
'''
Description: fonction pour creer le vocabulaire des mots presents
dans les e-mails spam et ham et le sauvegarder dans le fichier
vocabulary.json selon le format specifie dans la description de lab
Sortie: bool, 'True' pour succes, 'False' dans le cas de failure.
'''
emails = self.load_dict()
spamSubjects = []
hamSubjects = []
spamBodies = []
hamBodies = []
vocabulary = {
"spam_sub": {},
"ham_sub": {},
"spam_body": {},
"ham_body": {}
}
# ajout des sujets et des corps des emails de 800-mails.json dans le tableau respectif
for email in emails["dataset"]:
if email["mail"]["Spam"] == "true":
spamSubjects.extend(
self.clean_text(email["mail"]["Subject"], clean_text_mode))
spamBodies.extend(
self.clean_text(email["mail"]["Body"], clean_text_mode))
else:
hamSubjects.extend(
self.clean_text(email["mail"]["Subject"], clean_text_mode))
hamBodies.extend(
self.clean_text(email["mail"]["Body"], clean_text_mode))
spam_sub = list(dict.fromkeys(spamSubjects))
ham_sub = list(dict.fromkeys(hamSubjects))
spam_body = list(dict.fromkeys(spamBodies))
ham_body = list(dict.fromkeys(hamBodies))
# calcul des probabilites spam et ham pour chaque mots
if (minWordFreq > 4):
minWordFreq = 4
elif (minWordFreq < 1):
minWordFreq = 1
for word in spam_sub:
if (spamSubjects.count(word) >= minWordFreq):
vocabulary["spam_sub"][word] = spamSubjects.count(word) / len(
spamSubjects)
for word in ham_sub:
if (hamSubjects.count(word) >= minWordFreq):
vocabulary["ham_sub"][word] = hamSubjects.count(word) / len(
hamSubjects)
for word in spam_body:
if (spamBodies.count(word) >= minWordFreq):
vocabulary["spam_body"][word] = spamBodies.count(word) / len(
spamBodies)
for word in ham_body:
if (hamBodies.count(word) >= minWordFreq):
vocabulary["ham_body"][word] = hamBodies.count(word) / len(
hamBodies)
self.write_data_to_vocab_file(vocabulary)
return vocabulary
# fonction qui retourne le nombre de courriel spam
def count_spam(self):
emails = self.load_dict()
nSpams = 0
for email in emails["dataset"]:
if email["mail"]["Spam"] == "true":
nSpams += 1
return nSpams
# fonction qui retourne le nombre de courriel
def count_emails(self):
emails = self.load_dict()
return len(emails["dataset"])
# fonction qui retourne le nombre de courriel ham
def count_ham(self):
nHams = self.count_emails() - self.count_spam()
return nHams
def load_dict(self): # pragma: no cover
with open(self.train_set) as json_data:
data_dict = json.load(json_data)
return data_dict
def write_data_to_vocab_file(self, vocab): # pragma: no cover
try:
with open(self.vocabulary, 'w') as outfile:
json.dump(vocab, outfile)
print('vocabulary created......')
return True
except:
return False
def clean_text(self, text, cleaning_mode): # pragma: no cover
return self.cleaning.clean_text(text, cleaning_mode)
class VocabularyCreator:
"""Class for creating vocabulary of spam and non-spam messages"""
def __init__(self):
self.train_set = "1000-mails.json"
self.cleaning = TextCleaning()
self.vocabulary = "vocabulary.json"
def load_dict(self, file): # pragma: no cover
with open(file) as json_data:
data_dict = json.load(json_data)
return data_dict
def write_data_to_vocab_file(self, vocab): # pragma: no cover
try:
with open(self.vocabulary, "w") as outfile:
json.dump(vocab, outfile)
print("Vocabulary created...")
return True
except:
return False
def clean_text(self, text, option): # pragma: no cover
return self.cleaning.clean_text(text, option)
def total_words_spam_ham_section(self, file, section, cleaning_option):
'''
Description: fonction pour calculer le nombre de mots dans les
e-mails spam et ham, et pour recueillir les mots de chaque type
de e-mail.
Sortie: int, int, list, list; les deux premières pour le nombre
de mots dans chaque type de courriel, les deux dernières retou-
rnent une liste de mots regroupée pour chaque type.
'''
spam_section_words = []
ham_section_words = []
input_file = self.load_dict(file)
for email in input_file["dataset"]:
individual_email = email["mail"]
spam_bool = individual_email["Spam"]
clean_subject = self.cleaning.clean_text(
(individual_email[section]), cleaning_option)
if spam_bool == "true": spam_section_words += clean_subject
else: ham_section_words += clean_subject
return len(spam_section_words), len(
ham_section_words), spam_section_words, ham_section_words
def probability_email_type_section_words(self, file, section, email_type,
word_frequency, cleaning_option):
'''
Description: fonction pour calculer la probabilite de chaque mot
d'une certaine section du courriel (subject ou body) d'un certain
type de courriel (spam ou ham). En d'autres mots, cette fonction
a pour populer les quatre types de vocabulaire (spam_sub, ham_sub, ...)
dans vocabullary.json
Sortie: dictionnaire de mots
'''
word_probability_dict = {}
email_type_section_information = self.total_words_spam_ham_section(
file, section, cleaning_option)
if email_type == "Spam":
total_words_email_type_section = email_type_section_information[0]
list_words_email_type_section = email_type_section_information[2]
else:
total_words_email_type_section = email_type_section_information[1]
list_words_email_type_section = email_type_section_information[3]
for word in list_words_email_type_section:
same_word_counter = sum(
word == analyzed_word
for analyzed_word in list_words_email_type_section)
word_probability = same_word_counter / total_words_email_type_section
if same_word_counter >= word_frequency:
word_probability_dict[word] = round(word_probability, 4)
return word_probability_dict
def create_vocab(self, word_frequency, cleaning_option):
'''
Description: fonction pour creer le vocabulaire des mots presents
dans les e-mails spam et ham et le sauvegarder dans le fichier
vocabulary.json selon le format specifie dans la description de lab
Sortie: bool, 'True' pour succes, 'False' dans le cas de failure.
'''
try:
if word_frequency < 1 or word_frequency > 4:
return False
vocab_dict = {}
vocab_dict["spam_sub"] = self.probability_email_type_section_words(
self.train_set, "Subject", "Spam", word_frequency,
cleaning_option)
vocab_dict["ham_sub"] = self.probability_email_type_section_words(
self.train_set, "Subject", "Ham", word_frequency,
cleaning_option)
vocab_dict[
"spam_body"] = self.probability_email_type_section_words(
self.train_set, "Body", "Spam", word_frequency,
cleaning_option)
vocab_dict["ham_body"] = self.probability_email_type_section_words(
self.train_set, "Body", "Ham", word_frequency, cleaning_option)
self.write_data_to_vocab_file(vocab_dict)
return vocab_dict
except FileNotFoundError as e:
print("Error!", e.__class__, "occurred.")
print("File", e.filename, "was not found")
return False
def __init__(self, vocab_file):
self.vocab = vocab_file
self.cleaning = TextCleaning()
self.voc_data = {}
class EmailAnalyzer:
"""Classe pour classifier les e-mails comme spam ou non spam (ham)"""
def __init__(self, vocab_file):
self.vocab = vocab_file
self.cleaning = TextCleaning()
self.voc_data = {}
def is_spam(self, subject_orig, body_orig):
'''
Description: fonction pour verifier si e-mail est spam ou ham,
en calculant les probabilites d'etre spam et ham,
donnee le sujet et le texte d'email.
Sortie: 'True' - si l'email est spam, 'False' - si email est ham.
'''
# Clean email's subject and body
email_subject = self.clean_text(subject_orig)
email_body = self.clean_text(body_orig)
# Get the spam/ham probabilities
p_subject_spam, p_subject_ham = self.spam_ham_subject_prob(email_subject)
p_body_spam, p_body_ham = self.spam_ham_body_prob(email_body)
# Compute the merged probabilities
p_spam = 0.5 * (p_subject_spam + p_body_spam)
p_ham = 0.5 * (p_subject_ham + p_body_ham)
# Decide is the email is spam or ham
if p_spam > p_ham:
return True
else:
return False
def spam_ham_body_prob(self, body):
'''
Description: fonction pour calculer la probabilite
que le 'body' d'email est spam ou ham.
Sortie: probabilite que email body est spam, probabilite
que email body est ham.
'''
p_spam = 1.0
p_ham = 1.0
voc_data = self.load_dict()
# Walk the text to compute the probability
for word in body:
# Check the spam probability
if word in voc_data["p_body_spam"]:
p_spam *= voc_data["p_body_spam"][word]
else:
p_spam *= 1.0 / (len(voc_data["p_body_spam"]) + 1.0)
# Check the ham probability
if word in voc_data["p_body_ham"]:
p_ham *= voc_data["p_body_ham"][word]
else:
p_ham *= 1.0 / (len(voc_data["p_body_ham"]) + 1.0)
p_spam *= 0.5925
p_ham *= 0.4075
return (p_spam, p_ham)
def spam_ham_subject_prob(self, subject):
'''
Description: fonction pour calculer la probabilite
que le sujet d'email est spam ou ham.
Sortie: probabilite que email subject est spam, probabilite
que email subject est ham.
'''
p_spam = 1.0
p_ham = 1.0
voc_data = self.load_dict()
# Walk the text to compute the probability
for word in subject:
# Check the spam probability
if word in voc_data["p_sub_spam"]:
p_spam *= voc_data["p_sub_spam"][word]
else:
p_spam *= 1.0 / (len(voc_data["p_sub_spam"]) + 1.0)
# Check the ham probability
if word in voc_data["p_sub_ham"]:
p_ham *= voc_data["p_sub_ham"][word]
else:
p_ham *= 1.0 / (len(voc_data["p_sub_ham"]) + 1.0)
p_spam *= 0.5925
p_ham *= 0.4075
return (p_spam, p_ham)
def clean_text(self, text):
return self.cleaning.clean_text(text)
def load_dict(self):
# Open vocabulary
with open(self.vocab) as json_data:
vocabu = json.load(json_data)
return vocabu
class EmailAnalyzer:
"""Classe pour classifier les e-mails comme spam ou non spam (ham)"""
def __init__(self):
self.vocab = "vocabulary.json"
self.cleaning = TextCleaning()
self.voc_data = {}
def is_spam(self, subject_orig, body_orig, is_log_estimation, is_log_combination, clean_text_mode, k):
'''
Description: fonction pour verifier si e-mail est spam ou ham,
en calculant les probabilites d'etre spam et ham,
donnee le sujet et le texte d'email.
Sortie: 'True' - si l'email est spam, 'False' - si email est ham.
'''
if is_log_estimation:
p_subject = self.log_p_spam_ham_subject(subject_orig, clean_text_mode)
p_body = self.log_p_spam_ham_body(subject_orig, clean_text_mode)
p_spam_subject = math.pow(p_subject[0], 10)
p_spam_body = math.pow(p_body[0], 10)
p_ham_subject = math.pow(p_subject[1], 10)
p_ham_body = math.pow(p_body[1], 10)
else:
p_subject = self.subject_spam_ham_prob(subject_orig, clean_text_mode)
p_body = self.body_spam_ham_prob(body_orig, clean_text_mode)
p_spam_subject = p_subject[0]
p_spam_body = p_body[0]
p_ham_subject = p_subject[1]
p_ham_body = p_body[1]
if is_log_combination:
if p_spam_subject > 0:
if p_spam_body > 0: #case where pspam_subject and pspam_body are both positive
p_spam = k * math.log10(p_spam_subject) + (1 - k) * math.log10(p_spam_body)
else: #case where pspam_subject is positive and pspam_body is negative
p_spam = k * math.log10(p_spam_subject) + (1 - k) * p_spam_body
elif p_spam_body > 0: #case where pspam_subject is negative and pspam_body is positive
p_spam = k*p_spam_subject + (1 - k) * math.log10(p_spam_body)
else: #case where pspam_subject and pspam_body are both negative
p_spam = k * p_spam_subject + (1 - k) * p_spam_body
if p_ham_subject > 0:
if p_ham_body > 0:
p_ham = k * math.log10(p_ham_subject) + (1 - k) * math.log10(p_ham_body)
else:
p_ham = math.log10(p_ham_subject) + (1 - k) * p_ham_body
elif p_ham_body <= 0:
p_ham = k * p_ham_subject + (1 - k) * math.log10(p_ham_body)
else:
p_ham = p_ham_subject + (1 - k) * p_ham_body
else:
p_spam = k * p_spam_subject + (1 - k) * p_spam_body
p_ham = k * p_ham_subject + (1 - k) * p_ham_body
if p_spam > p_ham:
return True
return False
# def is_spam(self, subject_orig, body_orig):
# '''
# Description: fonction pour verifier si e-mail est spam ou ham,
# en calculant les probabilites d'etre spam et ham,
# donnee le sujet et le texte d'email.
# Sortie: 'True' - si l'email est spam, 'False' - si email est ham.
# '''
# # Clean email's subject and body
# email_subject = self.clean_text(subject_orig)
# email_body = self.clean_text(body_orig)
# # Get the spam/ham probabilities
# p_subject_spam, p_subject_ham = self.spam_ham_subject_prob(email_subject)
# p_body_spam, p_body_ham = self.spam_ham_body_prob(email_body)
# # Compute the merged probabilities
# p_spam = 0.5 * (p_subject_spam + p_body_spam)
# p_ham = 0.5 * (p_subject_ham + p_body_ham)
# # Decide is the email is spam or ham
# if p_spam > p_ham:
# return True
# else:
# return False
def spam_ham_body_prob(self, body):
'''
Description: fonction pour calculer la probabilite
que le 'body' d'email est spam ou ham.
Sortie: probabilite que email body est spam, probabilite
que email body est ham.
'''
p_spam = 1.0
p_ham = 1.0
voc_data = self.load_dict()
# Walk the text to compute the probability
for word in body:
# Check the spam probability
if word in voc_data["p_body_spam"]:
p_spam *= voc_data["p_body_spam"][word]
else:
p_spam *= 1.0 / (len(voc_data["p_body_spam"]) + 1.0)
# Check the ham probability
if word in voc_data["p_body_ham"]:
p_ham *= voc_data["p_body_ham"][word]
else:
p_ham *= 1.0 / (len(voc_data["p_body_ham"]) + 1.0)
p_spam *= 0.5925
p_ham *= 0.4075
return (p_spam, p_ham)
def spam_ham_subject_prob(self, subject):
'''
Description: fonction pour calculer la probabilite
que le sujet d'email est spam ou ham.
Sortie: probabilite que email subject est spam, probabilite
que email subject est ham.
'''
p_spam = 1.0
p_ham = 1.0
voc_data = self.load_dict()
# Walk the text to compute the probability
for word in subject:
# Check the spam probability
if word in voc_data["p_sub_spam"]:
p_spam *= voc_data["p_sub_spam"][word]
else:
p_spam *= 1.0 / (len(voc_data["p_sub_spam"]) + 1.0)
# Check the ham probability
if word in voc_data["p_sub_ham"]:
p_ham *= voc_data["p_sub_ham"][word]
else:
p_ham *= 1.0 / (len(voc_data["p_sub_ham"]) + 1.0)
p_spam *= 0.5925
p_ham *= 0.4075
return (p_spam, p_ham)
def body_spam_ham_prob(self, body, clean_text_mode):
'''
Description: fonction pour calculer la probabilite
que le 'body' d'email est spam ou ham.
Sortie: probabilite que email body est spam, probabilite
que email body est ham.
'''
p_spam_body = 1
p_ham_body = 1
pspam_pham = self.calculate_pspam_pham('train_set.json')
p_spam = pspam_pham[0]
p_ham = pspam_pham[1]
with open(self.vocab) as f:
input_file = json.load(f)
# body = self.cleaning.clean_text(body)
body = self.clean_text(body, clean_text_mode)
n_spam_words = len(input_file["p_body_spam"])
n_ham_words = len(input_file["p_body_ham"])
for word in body:
if word in input_file["p_body_spam"]:
p_spam_body *= input_file["p_body_spam"][word]
elif word in input_file["p_body_ham"] or word in input_file["p_sub_ham"] or word in input_file["p_sub_spam"]:
p_spam_body *= 1 / (n_spam_words + 1)
if word in input_file["p_body_ham"]:
p_ham_body *= input_file["p_body_ham"][word]
elif word in input_file["p_body_spam"] or word in input_file["p_sub_ham"] or word in input_file["p_sub_spam"]:
p_ham_body *= 1 / (n_ham_words + 1)
'''
for word in input_file["p_body_spam"]:
if word == word:
p_spam_body *= input_file["p_body_spam"][word]
for word in input_file["p_body_ham"]:
if word == word:
p_ham_body *= input_file["p_body_ham"][word]
'''
return p_spam * p_spam_body, p_ham * p_ham_body
def log_p_spam_ham_body(self, body, clean_text_mode):
'''
Description: fonction pour calculer la probabilite
que le 'body' d'email est spam ou ham.
Sortie: probabilite que email body est spam, probabilite
que email body est ham.
'''
p_spam_body = 0
p_ham_body = 0
pspam_pham = self.calculate_pspam_pham('train_set.json')
if pspam_pham[0] > 0:
p_spam = math.log10(pspam_pham[0])
else:
p_spam = pspam_pham[0]
if pspam_pham[1] > 0:
p_ham = math.log10(pspam_pham[1])
else:
p_ham = pspam_pham[1]
with open(self.vocab) as inputfile:
input_file = json.load(inputfile)
body = self.clean_text(body, clean_text_mode)
n_spam_words = len(input_file["p_body_spam"])
n_ham_words = len(input_file["p_body_ham"])
for word in body:
if word in input_file["p_body_spam"]:
if input_file["p_body_spam"][word] > 0:
p_spam_body += math.log10(input_file["p_body_spam"][word])
else:
p_spam_body += input_file["p_body_spam"][word]
elif word in input_file["p_sub_spam"] or word in input_file["p_body_spam"] or word in input_file["p_sub_ham"]:
p_spam_body += math.log10(1 / (n_spam_words + 1))
if word in input_file["p_body_ham"]:
if input_file["p_body_ham"][word] > 0:
p_ham_body += math.log10(input_file["p_body_ham"][word])
else:
p_ham_body += input_file["p_body_ham"][word]
elif word in input_file["p_sub_spam"] or word in input_file["p_body_spam"] or word in input_file["p_body_ham"]:
p_ham_body += math.log10(1 / (n_spam_words + 1))
return p_spam + p_spam_body, p_ham + p_ham_body
def subject_spam_ham_prob(self, subject, clean_text_mode):
'''
Description: fonction pour calculer la probabilite
que le sujet d'email est spam ou ham.
Sortie: probabilite que email subject est spam, probabilite
que email subject est ham.
'''
p_spam_subject = 1
p_ham_subject = 1
pspam_pham = self.calculate_pspam_pham('train_set.json')
p_spam = pspam_pham[0]
p_ham = pspam_pham[1]
with open(self.vocab) as f:
input_file = json.load(f)
# body = self.cleaning.clean_text(body)
clean_sub = self.clean_text(subject, clean_text_mode)
n_spam_words = len(input_file["p_sub_spam"])
n_ham_words = len(input_file["p_sub_ham"])
for word in clean_sub:
if word in input_file["p_sub_spam"]:
p_spam_subject *= input_file["p_sub_spam"][word]
elif word in input_file["p_body_spam"] or word in input_file["p_sub_ham"] or word in input_file["p_sub_spam"]:
p_spam_subject *= 1 / (n_spam_words + 1)
if word in input_file["p_sub_ham"]:
p_ham_subject *= input_file["p_sub_ham"][word]
elif word in input_file["p_body_spam"] or word in input_file["p_body_ham"] or word in input_file["p_sub_spam"]:
p_ham_subject *= 1 / (n_ham_words + 1)
return p_spam * p_spam_subject, p_ham * p_ham_subject
def log_p_spam_ham_subject(self, subject, clean_text_mode):
'''
Description: fonction pour calculer la probabilite
que le sujet d'email est spam ou ham.
Sortie: probabilite que email subject est spam, probabilite
que email subject est ham.
'''
p_spam_subject = 0
p_ham_subject = 0
pspam_pham = self.calculate_pspam_pham('train_set.json')
if pspam_pham[0] > 0:
p_spam = math.log10(pspam_pham[0])
else:
p_spam = pspam_pham[0]
if pspam_pham[1] > 0:
p_ham = math.log10(pspam_pham[1])
else:
p_ham = pspam_pham[1]
with open(self.vocab) as inputfile:
input_file = json.load(inputfile)
subject = self.clean_text(subject, clean_text_mode)
n_spam_words = len(input_file["p_sub_spam"])
n_spam_words = len(input_file["p_sub_ham"])
for word in subject:
if word in input_file["p_sub_spam"]:
if input_file["p_sub_spam"][word] > 0:
p_spam_subject += math.log10(input_file["p_sub_spam"][word])
else:
p_spam_subject += (input_file["p_sub_spam"][word])
elif word in input_file["p_sub_spam"] or word in input_file["p_body_spam"] or word in input_file["p_sub_ham"]:
p_spam_subject += math.log10(1 / (n_spam_words + 1))
if word in input_file["p_sub_ham"]:
if input_file["p_sub_ham"][word] > 0:
p_ham_subject += math.log10(input_file["p_sub_ham"][word])
else:
p_ham_subject += input_file["p_sub_ham"][word]
elif word in input_file["p_sub_spam"] or word in input_file["p_body_spam"] or word in input_file["p_body_ham"]:
p_ham_subject += math.log10(1 / (n_spam_words + 1))
p_spam = p_spam + p_spam_subject
p_ham = p_ham + p_ham_subject
return p_spam, p_ham
def calculate_pspam_pham(self, file):
'''
Description: fonction qui calcule la probabilite
qu'un message soit spam ou ham dans un fichier
Sortie: int, int: P(spam), P(ham)
'''
n_spam = 0
n_ham = 0
with open(file) as data:
input_file = json.load(data)
for email in input_file["dataset"]:
mail = email["mail"]
is_spam = mail["Spam"]
if is_spam == "true":
n_spam += 1
else:
n_ham += 1
# calculer le nombre d'emails
n_emails = len(input_file["dataset"])
return n_spam/n_emails, n_ham/n_emails
def clean_text(self, text, mode):
return self.cleaning.clean_text(text, mode)
def load_dict(self):
# Open vocabulary
with open(self.vocab) as json_data:
vocabu = json.load(json_data)
return vocabu
