def swap_chars(self, word):
"""
Randomly swap letters between two positions in a word.
"""
i, j = utils.rand_index(word), utils.rand_index(word)
if i > j:
i, j = j, i # swaps i and j
uword = word[:i] + word[j] + word[i + 1:j] + word[i] + word[j + 1:]
log.debug("[swap char] {} -> {}: %s".format(word, uword))
return uword
def flip_char(self, word):
"""
Randomly flip letters between two positions in a word.
"""
log.debug("flip change---before: %s" % word)
i, j = utils.rand_index(word), utils.rand_index(word)
if i > j:
i, j = j, i # swaps i and j
word = word[:i] + word[j] + word[i + 1:j] + word[i] + word[j + 1:]
log.debug("flip change---after: %s" % word)
return word
def repeat_char(self, word):
"""
Randomly repeat a letter in a word.
"""
pos = utils.rand_index(word)
uword = word[:pos] + word[pos] + word[pos:]
log.debug("[repeat char] {} -> {}: %s".format(word, uword))
return uword
def flip_rand_pairs(self, word):
"""
Randomly flip two neighboring letters in a word.
"""
pos = utils.rand_index(word)
i, j = (pos - 1, pos) if pos > 0 else (pos, pos + 1)
uword = word[:i] + word[j] + word[i] + word[j + 1:]
return uword
def add_char(self, word):
"""
Randomly add a vowel or a letter from a word.
"""
pos = utils.rand_index(word)
addition = random.choice(list(word + 'aeiou'))
uword = word[:pos] + addition + word[pos:]
log.debug("[add char] {} -> {}: %s".format(word, uword))
return uword
def repeat_char(self, word):
"""
Randomly repeat a letter in a word.
"""
log.debug("repeat change---before: %s" % word)
pos = utils.rand_index(word)
word = word[:pos] + word[pos] + word[pos:]
log.debug("repeat change---after: %s" % word)
return word
def swap_char(self, word):
"""
Randomly swap two neighboring letters in a word.
"""
log.debug("swap change---before: %s" % word)
pos = utils.rand_index(word)
i, j = (pos - 1, pos) if pos > 0 else (pos, pos + 1)
word = word[:i] + word[j] + word[i] + word[j + 1:]
log.debug("swap change---after: %s" % word)
return word
def add_char(self, word):
"""
Randomly add vowel to word.
"""
log.debug("addition change---before: %s" % word)
pos = utils.rand_index(word)
addition = random.choice(list(word+'aeiou'))
word = word[:pos] + addition + word[pos:]
log.debug("addition change---after: %s" % word)
return word
def drop_char(self, word):
"""
Drop char in a word.
TODO test [vowel or double] only.
"""
pos = utils.rand_index(word)
if pos == 0:
pos += 1 # don't drop first letter of a word
uword = word[:pos] + word[pos + 1:]
log.debug("[drop char] {} -> {}: %s".format(word, uword))
return uword
def drop_char(self, word):
"""
Drop char in a word.
TODO test [vowel or double] only.
"""
log.debug("drop change---before: %s" % word)
pos = utils.rand_index(word)
if pos == 0:
pos += 1 # don't drop first letter of a word
uword = word[:pos] + word[pos+1:]
log.debug("drop change---after: %s" % word)
return uword
