def main():
A = em.read_csv_metadata('../Data/A_imdb.csv', key='id')
B = em.read_csv_metadata('../Data/B_tmdb.csv', key='id')
ab = em.AttrEquivalenceBlocker()
shared_attributes = ['title', 'directors', 'release_year', 'languages']
C = ab.block_tables(A,
B,
'directors',
'directors',
l_output_attrs=shared_attributes,
r_output_attrs=shared_attributes)
# Take a sample of 10 pairs
S = em.sample_table(C, 100)
print(S)
G = em.label_table(S, label_column_name='gold_labels')
train_test = em.split_train_test(G, train_proportion=0.5)
train, test = train_test['train'], train_test['test']
# Get feature for matching
match_f = em.get_features_for_matching(A, B)
H = em.extract_feature_vecs(train,
attrs_before=['ltable_title', 'rtable_title'],
feature_table=match_f,
attrs_after=['gold_labels'])
H.fillna(value=0, inplace=True)
print(H)
# Specifying Matchers and Performing Matching.
dt = em.DTMatcher(max_depth=5) # A decision tree matcher.
# Train the matcher
dt.fit(table=H,
exclude_attrs=[
'_id', 'ltable_id', 'rtable_id', 'ltable_title', 'rtable_title',
'gold_labels'
],
target_attr='gold_labels')
# Predict
F = em.extract_feature_vecs(test,
attrs_before=['ltable_title', 'rtable_title'],
feature_table=match_f,
attrs_after=['gold_labels'])
F.fillna(value=0, inplace=True)
print(F)
pred_table = dt.predict(table=F,
exclude_attrs=[
'_id', 'ltable_id', 'rtable_id',
'ltable_title', 'rtable_title', 'gold_labels'
],
target_attr='predicted_labels',
return_probs=True,
probs_attr='proba',
append=True,
inplace=True)
print(pred_table)
eval_summary = em.eval_matches(pred_table, 'gold_labels',
'predicted_labels')
em.print_eval_summary(eval_summary)
C = bb.block_candset(C)
len(C)
bb.set_black_box_function(first_address_number_match)
C = bb.block_candset(C)
len(C)
bb.set_black_box_function(first_phone_number_match)
C = bb.block_candset(C)
len(C)
"""
print("\n- Sampling and Labeling...")
S = em.sample_table(C, 50)
G = em.label_table(S, 'label')
IJ = em.split_train_test(G, train_proportion=0.7, random_state=0)
I = IJ['train']
J = IJ['test']
ltable_pk = "ltable_" + pk_A
rtable_pk = "rtable_" + pk_B
dt = em.DTMatcher(name='DecisionTree', random_state=0)
svm = em.SVMMatcher(name='SVM', random_state=0)
rf = em.RFMatcher(name='RF', random_state=0)
lg = em.LogRegMatcher(name='LogReg', random_state=0)
ln = em.LinRegMatcher(name='LinReg')
nb = em.NBMatcher(name='NaiveBayes')
def main():
A = em.read_csv_metadata('ltable.csv',
key="ltable_id",
encoding='ISO-8859-1')
B = em.read_csv_metadata('rtable.csv',
key="rtable_id",
encoding='ISO-8859-1')
ob = em.OverlapBlocker()
C = ob.block_tables(
A,
B,
'title',
'title',
l_output_attrs=['title', 'category', 'brand', 'modelno', 'price'],
r_output_attrs=['title', 'category', 'brand', 'modelno', 'price'],
overlap_size=1,
show_progress=False)
S = em.sample_table(C, 450)
G = em.read_csv_metadata("train.csv",
key='id',
ltable=A,
rtable=B,
fk_ltable='ltable_id',
fk_rtable='rtable_id')
feature_table = em.get_features_for_matching(
A, B, validate_inferred_attr_types=False)
G = em.label_table(S, 'label')
attrs_from_table = [
'ltable_title', 'ltable_category', 'ltable_brand', 'ltable_modelno',
'ltable_price', 'rtable_title', 'rtable_category', 'rtable_brand',
'rtable_modelno', 'rtable_price'
]
H = em.extract_feature_vecs(G,
feature_table=feature_table,
attrs_before=attrs_from_table,
attrs_after='label',
show_progress=False)
H.fillna('0', inplace=True)
# H = em.impute_table(
# H, exclude_attrs=['_id', 'ltable_ltable_id', 'rtable_rtable_id','label'], strategy='mean')
rf = em.RFMatcher()
attrs_to_be_excluded = []
attrs_to_be_excluded.extend(
['_id', 'ltable_ltable_id', 'rtable_rtable_id', 'label'])
attrs_to_be_excluded.extend(attrs_from_table)
rf.fit(table=H, exclude_attrs=attrs_to_be_excluded, target_attr='label')
attrs_from_table = [
'ltable_title', 'ltable_category', 'ltable_brand', 'ltable_modelno',
'ltable_price', 'rtable_title', 'rtable_category', 'rtable_brand',
'rtable_modelno', 'rtable_price'
]
L = em.extract_feature_vecs(C,
feature_table=feature_table,
attrs_before=attrs_from_table,
show_progress=False,
n_jobs=-1)
attrs_to_be_excluded = []
attrs_to_be_excluded.extend(
['_id', 'ltable_ltable_id', 'rtable_rtable_id'])
attrs_to_be_excluded.extend(attrs_from_table)
predictions = rf.predict(table=L,
exclude_attrs=attrs_to_be_excluded,
append=True,
target_attr='predicted',
inplace=False)
dataset = pd.DataFrame({"id": G[0]['id'], 'label': predictions['label']})
dataset.to_csv("./prediction2.csv", index=False)
#
#
# <h1> Sampling and labeling the candidate set
# First, we randomly sample 350 tuple pairs for labeling purposes.
# In[105]:
##Sample candidate set
S = em.sample_table(C4, 350)
# In[23]:
##Label S
G = em.label_table(S, 'gold_labels')
# Load labeled data fom previous session
# In[105]:
G = em.load_object('./GoldenData.pkl')
len(G)
# In[106]:
## Loading G into em catalog
em.set_fk_ltable(G, 'ltable_ID')
em.set_fk_rtable(G, 'rtable_ID')
em.set_key(G, '_id')
def main():
# WELCOME TO MY MAGELLAN RUN SCRIPT
print("\n-------------WELCOME TO MY MAGELLAN RUN SCRIPT-------------\n")
# Get the datasets directory
datasets_dir = 'B:\McMaster\CAS 764 - Advance Topics in Data Management\Project\Data\\'
print("- Dataset directory: " + datasets_dir)
print("- List of folders/files: ")
print(os.listdir(datasets_dir))
print("- Please enter new dataset folder name:")
datasets_dir += input()
print("- Dataset directory set to: " + datasets_dir)
dateset_dir_files = os.listdir(datasets_dir)
print("- List of files in dataset folder: ")
print(dateset_dir_files)
# Get the path of the input table A
print("- Enter an index for Table A file (0-x):")
file_index_A = input()
filename_A = dateset_dir_files[int(file_index_A)]
print("Table A file set to: " + filename_A)
# Get the path of the input table
path_A = datasets_dir + os.sep + filename_A
# Get the path of the input table B
print("- Enter an index for Table B file (0-x):")
file_index_B = input()
filename_B = dateset_dir_files[int(file_index_B)]
print("Table B file set to: " + filename_B)
# Get the path of the input table
path_B = datasets_dir + os.sep + filename_B
# Print Table A column names
A = em.read_csv_metadata(path_A)
print("- List of columns of Table A: ")
print(list(A.columns))
# Get the Table A id/primary key column name
print('- Enter Table A primary key column index (ex. 0):')
pk_A_index = input()
pk_A = A.columns[int(pk_A_index)]
# Print Table B column names
B = em.read_csv_metadata(path_B)
print("- List of columns of Table B: ")
print(list(B.columns))
# Get the Table B id/primary key column name
print('- Enter Table B primary key column index (ex. 0):')
pk_B_index = input()
pk_B = A.columns[int(pk_A_index)]
# READING TABLES AND SETTING METADATA
print("\n-------------READING TABLES AND SETTING METADATA-------------\n")
# Both read csv and set metadata id as ID column
#A = em.read_csv_metadata(path_A, key=pk_A)
#B = em.read_csv_metadata(path_B, key=pk_B)
em.set_key(A, pk_A)
em.set_key(B, pk_B)
# Number of tables
print('- Number of tuples in A: ' + str(len(A)))
print('- Number of tuples in B: ' + str(len(B)))
print('- Number of tuples in A X B (i.e the cartesian product): ' +
str(len(A) * len(B)))
# Print first 5 tuples of tables
print(A.head())
print(B.head())
# Display the keys of the input tables
print("- Table A primary key: " + em.get_key(A))
print("- Table B primary key: " + em.get_key(B))
# DOWNSAMPLING
print("\n-------------DOWNSAMPING-------------\n")
print("- Do you want to use downsampling? (y or n):")
print("- Table A: " + str(len(A)) + ", Table B: " + str(len(B)))
print("- NOTE: Recommended if both tables have 100K+ tuples.")
is_downsample = input()
if (is_downsample == 'y'):
print("- Size of the downsampled tables (ex. 200):")
downsample_size = input()
# If the tables are large we can downsample the tables like this
A1, B1 = em.down_sample(A, B, downsample_size, 1, show_progress=False)
print("- Length of Table A1" + len(A1))
print("- Length of Table B1" + len(B1))
# BLOCKING
print("\n-------------BLOCKING-------------\n")
print("- Do you want to use blocking? (y or n):")
is_blocking = input()
if (is_blocking == 'y'):
# Check if the 2 tables column names are the same
if (list(A.columns) == list(B.columns)):
C_attr_eq = [] # Attr Equ blocker result list
C_overlap = [] # Overlap blocker result list
C_blackbox = [] # BlackBox blocker result list
# Left and right table attribute prefixes
l_prefix = "ltable_"
r_prefix = "rtable_"
print("\n- List of columns: ")
print(list(A.columns))
# Labeling output table column selection
print(
"\n- Enter the indexes of columns that you want to see in labeling table (0-"
+ str(len(A.columns) - 1) + "):")
out_attr = []
for i in range(1, len(A.columns)):
print("- Finish with empty character(enter+enter) " + str(i))
add_to_attr = input()
if (add_to_attr == ''):
break
# Get indexes from user and add columns into out_attr list
out_attr.append(A.columns[int(add_to_attr)])
# Print output attributes
print(out_attr)
# Loop for adding/combining new blockers
while (True):
# Blocker selection
print(
"\n- Do yo want to use Attribute Equivalence[ab] (same), Overlap[ob] (similar) or Blackbox[bb] blocker:"
)
blocker_selection = input()
# ----- Attribute Equivalence Blocker -----
if (blocker_selection == 'ab'):
# Create attribute equivalence blocker
ab = em.AttrEquivalenceBlocker()
# Counter for indexes
attr_eq_counter = 0
# Check if Overlap Blocker used before
if (C_overlap and not C_overlap[-1].empty):
print(
"\n- Do you want to work on Overlap Blocker candidate set or not (y or n):"
)
use_cand_set = input()
if (use_cand_set == 'y'):
C_attr_eq.append(
C_overlap[-1]) # Add last output of ob
attr_eq_counter += 1 # For skipping block_table function in first time
# Check if BlackBox Blocker used before
if (C_blackbox and not C_blackbox[-1].empty):
print(
"\n- Do you want to work on BlackBox Blocker candidate set or not (y or n):"
)
use_cand_set = input()
if (use_cand_set == 'y'):
C_attr_eq.append(
C_blackbox[-1]) # Add last output of ob
attr_eq_counter += 1 # For skipping block_table function in first time
# Loop for adding more columns/attributes into Attr Equ blocker
while (True):
# List column names
print("\n- List of columns: ")
print(list(A.columns))
# Get blocking attribute/column
print(
"\n- Which column (w/ index) to use for equivalence blocking? (ex. 1):"
)
blocking_col_index = input()
blocking_col = A.columns[int(blocking_col_index)]
print(
"\n- Do you want to add missing values into blocking? (y or n):"
)
add_missing_val = input()
if (add_missing_val == 'y'):
add_missing_val = True
else:
add_missing_val = False
# First time using Attr Equ blocker, use A and B
if (attr_eq_counter == 0):
# Block using selected (blocking_col) attribute on A and B
C_attr_eq.append(
ab.block_tables(A,
B,
blocking_col,
blocking_col,
l_output_attrs=out_attr,
r_output_attrs=out_attr,
l_output_prefix=l_prefix,
r_output_prefix=r_prefix,
allow_missing=add_missing_val,
n_jobs=-1))
# Not first time, add new constraint into previous candidate set
else:
# Block using selected (blocking_col) attribute on previous (last=-1) candidate set
C_attr_eq.append(
ab.block_candset(C_attr_eq[-1],
l_block_attr=blocking_col,
r_block_attr=blocking_col,
allow_missing=add_missing_val,
n_jobs=-1,
show_progress=False))
# DEBUG BLOCKING
print(
"\n- Attribute Equivalence Blocker Debugging...\n")
# Debug last blocker output
dbg = em.debug_blocker(C_attr_eq[-1],
A,
B,
output_size=200,
n_jobs=-1)
# Display first few tuple pairs from the debug_blocker's output
print("\n- Blocking debug results:")
print(dbg.head())
attr_eq_counter += 1 # Increase the counter
# Continue to use Attribute Equivalence Blocker or not
print("\n- Length of candidate set: " +
str(len(C_attr_eq[-1])))
print(
"- Add another column into Attribute Equivalence Blocker[a] OR Reset last blocker's output[r]:"
)
ab_next_operation = input()
if (not ab_next_operation.islower()):
ab_next_operation = ab_next_operation.lower(
) # Lower case
# Continue using Attribute Equivalence Blocker
if (ab_next_operation == 'a'):
continue
# Reset/remove last blocker's output from candidate set list
elif (ab_next_operation == 'r'):
del C_attr_eq[-1]
print("\n- Last blocker output removed!")
print(
"- Continue to use Attribute Equivalence Blocker (y or n):"
)
ab_next_operation = input()
if (ab_next_operation == 'n'):
break
# Finish Attribute Equivalence Blocker
else:
break
# ----- Overlap Blocker -----
elif (blocker_selection == 'ob'):
# Create attribute equivalence blocker
ob = em.OverlapBlocker()
# Counter for indexes
overlap_counter = 0
# Check if Attribute Equivalence Blocker used before
if (C_attr_eq and not C_attr_eq[-1].empty):
print(
"\n- Do you want to work on Attribute Equivalence Blocker candidate set or not (y or n):"
)
use_cand_set = input()
if (use_cand_set == 'y'):
C_overlap.append(
C_attr_eq[-1]) # Add last output of ab
overlap_counter += 1 # For skipping block_table function in first time
# Check if BlackBox Blocker used before
if (C_blackbox and not C_blackbox[-1].empty):
print(
"\n- Do you want to work on BlackBox Blocker candidate set or not (y or n):"
)
use_cand_set = input()
if (use_cand_set == 'y'):
C_overlap.append(
C_blackbox[-1]) # Add last output of ob
overlap_counter += 1 # For skipping block_table function in first time
# Loop for adding more columns/attributes into Overlap blocker
while (True):
# List column names
print("- List of columns: ")
print(list(A.columns))
# Get blocking attribute/column
print(
"- Which column (w/ index) to use for overlap blocking? (ex. 1):"
)
blocking_col_index = input()
blocking_col = A.columns[int(blocking_col_index)]
print(
"\n- Do you want to add missing values into blocking? (y or n):"
)
add_missing_val = input()
if (add_missing_val == 'y'):
add_missing_val = True
else:
add_missing_val = False
print("\n- Use words as a token? (y or n):")
use_world_level = input()
if (use_world_level == 'y'):
use_world_level = True
q_gram_value = None
else:
use_world_level = False
print(
"\n- Q-gram q value (ex. 2 --> JO HN SM IT H):"
)
q_gram_value = input()
q_gram_value = int(q_gram_value)
print(
"\n- Enter the overlap size (# of tokens that overlap):"
)
overlap_size = input()
overlap_size = int(overlap_size)
print(
"\n- Do you want to remove (a, an, the) from token set? (y or n):"
)
use_stop_words = input()
if (use_stop_words == 'y'):
use_stop_words = True
else:
use_stop_words = False
# First time using Overlap blocker, use A and B
if (overlap_counter == 0):
# Block using selected (blocking_col) attribute on A and B
C_overlap.append(
ob.block_tables(A,
B,
blocking_col,
blocking_col,
l_output_attrs=out_attr,
r_output_attrs=out_attr,
l_output_prefix=l_prefix,
r_output_prefix=r_prefix,
rem_stop_words=use_stop_words,
q_val=q_gram_value,
word_level=use_world_level,
overlap_size=overlap_size,
allow_missing=add_missing_val,
n_jobs=-1))
# Not first time, add new constraint into previous candidate set
else:
# Block using selected (blocking_col) attribute on previous (last=-1) candidate set
C_overlap.append(
ob.block_candset(C_overlap[-1],
l_overlap_attr=blocking_col,
r_overlap_attr=blocking_col,
rem_stop_words=use_stop_words,
q_val=q_gram_value,
word_level=use_world_level,
overlap_size=overlap_size,
allow_missing=add_missing_val,
n_jobs=-1,
show_progress=False))
# DEBUG BLOCKING
print("\n- Overlap Blocker Debugging...\n")
# Debug last blocker output
dbg = em.debug_blocker(C_overlap[-1],
A,
B,
output_size=200,
n_jobs=-1)
# Display first few tuple pairs from the debug_blocker's output
print("\n- Blocking debug results:")
print(dbg.head())
overlap_counter += 1 # Increase the counter
# Continue to use Attribute Equivalence Blocker or not
print("\n- Length of candidate set: " +
str(len(C_overlap[-1])))
print(
"- Add another column into Overlap Blocker[a] OR Reset last blocker's output[r]:"
)
ob_next_operation = input()
if (not ob_next_operation.islower()):
ob_next_operation = ob_next_operation.lower(
) # Lower case
# Continue using Overlap Blocker
if (ob_next_operation == 'a'):
continue
# Reset/remove last blocker's output from candidate set list
elif (ob_next_operation == 'r'):
del C_overlap[-1]
print("\n- Last blocker output removed!")
print(
"- Continue to use Overlap Blocker (y or n):")
ob_next_operation = input()
if (ob_next_operation == 'n'):
break
# Finish Overlap Blocker
else:
break
# ----- BlackBox Blocker -----
elif (blocker_selection == 'bb'):
# Create attribute equivalence blocker
bb = em.BlackBoxBlocker()
# Counter for indexes
blackbox_counter = 0
# Check if Overlap Blocker used before
if (C_attr_eq and not C_attr_eq[-1].empty):
print(
"\n- Do you want to work on Attribute Equivalence Blocker candidate set or not (y or n):"
)
use_cand_set = input()
if (use_cand_set == 'y'):
C_blackbox.append(
C_attr_eq[-1]) # Add last output of ob
blackbox_counter += 1 # For skipping block_table function in first time
# Check if Overlap Blocker used before
if (C_overlap and not C_overlap[-1].empty):
print(
"\n- Do you want to work on Overlap Blocker candidate set or not (y or n):"
)
use_cand_set = input()
if (use_cand_set == 'y'):
C_blackbox.append(
C_overlap[-1]) # Add last output of ob
blackbox_counter += 1 # For skipping block_table function in first time
# Loop for adding more columns/attributes into BlackBox blocker
while (True):
# Set function
bb.set_black_box_function(
number_10_percent_comparision)
# First time using Overlap blocker, use A and B
if (overlap_counter == 0):
# Block on A and B
C_blackbox.append(
bb.block_tables(A,
B,
l_output_attrs=out_attr,
r_output_attrs=out_attr,
l_output_prefix=l_prefix,
r_output_prefix=r_prefix,
n_jobs=-1,
show_progress=False))
# Not first time, add new constraint into previous candidate set
else:
# Block on previous (last=-1) candidate set
C_blackbox.append(
bb.block_candset(C_blackbox[-1],
n_jobs=-1,
show_progress=False))
# DEBUG BLOCKING
print("\n- BlackBox Blocker Debugging...\n")
# Debug last blocker output
dbg = em.debug_blocker(C_blackbox[-1],
A,
B,
output_size=200,
n_jobs=-1)
# Display first few tuple pairs from the debug_blocker's output
print("\n- Blocking debug results:")
print(dbg.head())
blackbox_counter += 1 # Increase the counter
# Continue to use Attribute Equivalence Blocker or not
print("\n- Length of candidate set: " +
str(len(C_blackbox[-1])))
print(
"- Add another column into BlackBox Blocker[a] OR Reset last blocker's output[r]:"
)
bb_next_operation = input()
if (not bb_next_operation.islower()):
bb_next_operation = bb_next_operation.lower(
) # Lower case
# Continue using Overlap Blocker
if (bb_next_operation == 'a'):
continue
# Reset/remove last blocker's output from candidate set list
elif (bb_next_operation == 'r'):
del C_blackbox[-1]
print("\n- Last blocker output removed!")
print(
"- Continue to use BlackBox Blocker (y or n):")
bb_next_operation = input()
if (bb_next_operation == 'n'):
break
# Finish BlackBox Blocker
else:
break
print("\n- Do you want to add/use another blocker? (y or n):")
blocker_decision = input()
if (blocker_decision == 'n'):
break
print(
"\n- Which blocker output you want to use? (Attr Equ-ab, Overlap-ob, BlackBox-bb, Union-un)"
)
blocker_output_selection = input()
# Attribute Equ
if (blocker_output_selection == "ab"):
C = C_attr_eq[-1]
# Overlap
elif (blocker_output_selection == "ob"):
C = C_overlap[-1]
# Overlap
elif (blocker_output_selection == "bb"):
C = C_blackbox[-1]
# Union of blockers
elif (blocker_output_selection == "un"):
# Combine/union blockers candidate sets
print("\n- TODO: Unions Attr Equ and Overlap only!")
if (C_attr_eq and C_overlap and not C_attr_eq[-1].empty and
not C_overlap[-1].empty): # Both blocker types used
C = em.combine_blocker_outputs_via_union(
[C_attr_eq[-1], C_overlap[-1]])
print(
"\n- Blockers candidate set outputs combined via union."
)
else: # Error
C = []
print(
"\n- ERROR: Candidate set C is empty! Check blockers' results."
)
# Error
else:
C = []
print(
"\n- ERROR: Candidate set C is empty! Check blockers' results."
)
print("\n- Length of C: " + str(len(C)))
else:
print(
"\n- 2 Tables column names are different, they must be the same"
)
print(list(A.columns))
print(list(B.columns))
# SAMPLING&LABELING
print("\n-------------SAMPLING&LABELING-------------\n")
print("- Choose sampling size (eg. 450):")
sampling_size = input()
while (int(sampling_size) > len(C)):
print("- Sampling size cannot be bigger than " + str(len(C)))
sampling_size = input()
# Sample candidate set
S = em.sample_table(C, int(sampling_size))
print("- New window will pop-up for " + sampling_size + " sized table.")
print("- If there is a match, change tuple's label value to 1")
# Label S
G = em.label_table(S, 'label')
#DEVELOPMENT AND EVALUATION
print("\n-------------DEVELOPMENT AND EVALUATION-------------\n")
# Split S into development set (I) and evaluation set (J)
IJ = em.split_train_test(G, train_proportion=0.7, random_state=0)
I = IJ['train']
J = IJ['test']
#SELECTING THE BEST MATCHER
print("\n-------------SELECTING THE BEST MATCHER-------------\n")
# Create a set of ML-matchers
dt = em.DTMatcher(name='DecisionTree', random_state=0)
svm = em.SVMMatcher(name='SVM', random_state=0)
rf = em.RFMatcher(name='RF', random_state=0)
lg = em.LogRegMatcher(name='LogReg', random_state=0)
ln = em.LinRegMatcher(name='LinReg')
nb = em.NBMatcher(name='NaiveBayes')
print(
"\n- 6 different ML-matchers created: DL, SVM, RF, LogReg, LinReg, NB")
print("\n- Creating features...")
# Generate features
feature_table = em.get_features_for_matching(
A, B, validate_inferred_attr_types=False)
print("\n- Features list:")
# List the names of the features generated
print(feature_table['feature_name'])
print("\n- Converting the development set to feature vectors...")
# Convert the I into a set of feature vectors using feature_table
H = em.extract_feature_vecs(I,
feature_table=feature_table,
attrs_after='label',
show_progress=False)
print("\n- Feature table first rows:")
# Display first few rows
print(H.head())
# Primary key of tables = prefix + pk = l_id, r_id
ltable_pk = l_prefix + pk_A
rtable_pk = r_prefix + pk_B
# Check if the feature vectors contain missing values
# A return value of True means that there are missing values
is_missing_values = any(pd.notnull(H))
print("\n- Does feature vector have missing values: " +
str(is_missing_values))
if (is_missing_values):
# Impute feature vectors with the mean of the column values.
H = em.impute_table(
H,
exclude_attrs=['_id', ltable_pk, rtable_pk, 'label'],
strategy='mean',
val_all_nans=0.0)
#print("\n- Feature table first rows:")
# Display first few rows
#print(H.head())
print("- Impute table function used for missing values.")
print("\n- Selecting the best matcher using cross-validation...")
# Select the best ML matcher using CV
result = em.select_matcher(
matchers=[dt, rf, svm, ln, lg, nb],
table=H,
exclude_attrs=['_id', ltable_pk, rtable_pk, 'label'],
k=5,
target_attr='label',
metric_to_select_matcher='f1',
random_state=0)
print("\n- Results:")
print(result['cv_stats'])
#DEBUGGING THE MATCHER
print("\n-------------DEBUGGING THE MATCHER-------------\n")
# Split feature vectors into train and test
UV = em.split_train_test(H, train_proportion=0.5)
U = UV['train']
V = UV['test']
# Debug decision tree using GUI
em.vis_debug_rf(rf,
U,
V,
exclude_attrs=['_id', ltable_pk, rtable_pk, 'label'],
target_attr='label')
print("\n- Do you want to add another feature?")
H = em.extract_feature_vecs(I,
feature_table=feature_table,
attrs_after='label',
show_progress=False)
# Check if the feature vectors contain missing values
# A return value of True means that there are missing values
is_missing_values = any(pd.notnull(H))
print("\n- Does feature vector have missing values: " +
str(is_missing_values))
if (is_missing_values):
# Impute feature vectors with the mean of the column values.
H = em.impute_table(
H,
exclude_attrs=['_id', ltable_pk, rtable_pk, 'label'],
strategy='mean')
print("\n- Feature table first rows:")
# Display first few rows
print(H.head())
# Select the best ML matcher using CV
result = em.select_matcher(
[dt, rf, svm, ln, lg, nb],
table=H,
exclude_attrs=['_id', ltable_pk, rtable_pk, 'label'],
k=5,
target_attr='label',
metric_to_select_matcher='f1',
random_state=0)
print("\n- Results:")
print(result['cv_stats'])
#EVALUATING THE MATCHING OUTPUT
print("\n-------------EVALUATING THE MATCHING OUTPUT-------------\n")
print("\n- Converting the evaluation set to feature vectors...")
# Convert J into a set of feature vectors using feature table
L = em.extract_feature_vecs(J,
feature_table=feature_table,
attrs_after='label',
show_progress=False)
# Check if the feature vectors contain missing values
# A return value of True means that there are missing values
is_missing_values = any(pd.notnull(L))
print("\n- Does feature vector have missing values: " +
str(is_missing_values))
if (is_missing_values):
# Impute feature vectors with the mean of the column values.
L = em.impute_table(
L,
exclude_attrs=['_id', ltable_pk, rtable_pk, 'label'],
strategy='mean')
print("\n- Feature table first rows:")
# Display first few rows
print(L.head())
print("\n- Training the selected matcher...")
# Train using feature vectors from I
rf.fit(table=H,
exclude_attrs=['_id', ltable_pk, rtable_pk, 'label'],
target_attr='label')
print("\n- Predicting the matches...")
# Predict on L
predictions = rf.predict(
table=L,
exclude_attrs=['_id', ltable_pk, rtable_pk, 'label'],
append=True,
target_attr='predicted',
inplace=False)
print("\n- Evaluating the prediction...")
# Evaluate the predictions
eval_result = em.eval_matches(predictions, 'label', 'predicted')
print(em.print_eval_summary(eval_result))
print("\n- Time elapsed:")
print(datetime.now() - startTime)
print("\n-------------END-------------\n")
C = ob.block_candset(C, 'Author', 'Author')
end = datetime.datetime.now()
print((end - start).total_seconds())
em.to_csv_metadata(C, 'block.csv')
C
# In[10]:
#Sampling
S = em.sample_table(C, 350)
S
# In[11]:
#Labeling (In this project, we label the saved csv fie in Excel)
G = em.label_table(S, label_column_name='gold_labels')
# In[12]:
#save sampled Data to a file
em.to_csv_metadata(G, './noLabel.csv')
# In[13]:
# read the labeled data
G = em.read_csv_metadata('../Data/Label.csv',
key='_id',
ltable=A,
rtable=B,
fk_ltable='ltable_ID',
fk_rtable='rtable_ID')