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transformer.py
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transformer.py
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# -*- coding: utf-8 -*-
import numpy as np
def swap(wordid,word_index,index2word,top_words=20000):
word = index2word[wordid]
if len(word)!=1:
s = np.random.randint(0,len(word)-1)
cword = word[:s] + word[s+1] + word[s] + word[s+2:]
if cword in word_index:
wid = word_index[cword] + 3
if wid>=top_words:
wid = 2
else:
wid = 2
else:
cword = word
if cword in word_index:
wid = word_index[cword] + 3
if wid>=top_words:
wid = 2
else:
wid = 2
return (cword,wid)
def flip(wordid,word_index,index2word,top_words=20000):
word = index2word[wordid]
s = np.random.randint(0,len(word))
# cword = word[:s] + chr(97+np.random.randint(0,26)) + word[s+1:]
letter = ord(word[s])
rletter = np.random.randint(0,25)+97
if rletter >= letter:
rletter += 1
cword = word[:s] + chr(rletter) + word[s+1:]
if cword in word_index:
wid = word_index[cword] + 3
if wid >= top_words:
wid = 2
else:
wid = 2
return (cword,wid)
def f2(wordid,word_index,index2word,top_words=20000):
word = index2word[wordid]
s = np.random.randint(0,len(word))
letter = ord(word[s])
rletter = np.random.randint(0,25)+97
if rletter >= letter:
rletter += 1
cword = word[:s] + chr(rletter) + word[s+1:]
if len(word)>1:
s2 = np.random.randint(0,len(word)-1)
if s2>=s:
s2+=1
letter = ord(word[s2])
rletter = np.random.randint(0,25)+97
if rletter >= letter:
rletter += 1
cword = cword[:s2] + chr(rletter) + cword[s2+1:]
if cword in word_index:
wid = word_index[cword] + 3
if wid>=top_words:
wid = 2
else:
wid = 2
return (cword,wid)
def remove(wordid,word_index,index2word,top_words=20000):
word = index2word[wordid]
s = np.random.randint(0,len(word))
if len(word)>1:
cword = word[:s] + word[s+1:]
else:
cword = word
if cword in word_index:
wid = word_index[cword] + 3
if wid>=top_words:
wid = 2
else:
wid = 2
return (cword,wid)
def remove2(wordid,word_index,index2word,top_words=20000):
word = index2word[wordid]
s = np.random.randint(0,len(word))
if len(word)>1:
cword = word[:s] + word[s+1:]
else:
cword = word
if len(cword)>1:
s = np.random.randint(0,len(cword))
cword = cword[:s] + cword[s+1:]
if cword in word_index:
wid = word_index[cword] + 3
if wid>=top_words:
wid = 2
else:
wid = 2
return (cword,wid)
def insert(wordid,word_index,index2word,top_words=20000):
word = index2word[wordid]
s = np.random.randint(0,len(word)+1)
cword = word[:s] + chr(97+np.random.randint(0,26)) + word[s:]
if cword in word_index:
wid = word_index[cword] + 3
if wid>=top_words:
wid = 2
else:
wid = 2
return (cword,wid)
homos = {'-':'˗','9':'৭','8':'Ȣ','7':'𝟕','6':'б','5':'Ƽ','4':'Ꮞ','3':'Ʒ','2':'ᒿ','1':'l','0':'O',"'":'`','a': 'ɑ', 'b': 'Ь', 'c': 'ϲ', 'd': 'ԁ', 'e': 'е', 'f': '𝚏', 'g': 'ɡ', 'h': 'հ', 'i': 'і', 'j': 'ϳ', 'k': '𝒌', 'l': 'ⅼ', 'm': 'ｍ', 'n': 'ո', 'o':'о', 'p': 'р', 'q': 'ԛ', 'r': 'ⲅ', 's': 'ѕ', 't': '𝚝', 'u': 'ս', 'v': 'ѵ', 'w': 'ԝ', 'x': '×', 'y': 'у', 'z': 'ᴢ'}
def homoglyph(wordid,word_index,index2word,top_words=20000):
word = index2word[wordid]
s = np.random.randint(0,len(word))
if word[s] in homos:
rletter = homos[word[s]]
else:
rletter = word[s]
cword = word[:s] + rletter + word[s+1:]
if cword in word_index:
wid = word_index[cword] + 3
if wid >= top_words:
wid = 2
else:
wid = 2
return (cword,wid)
def transform(name):
if "swap" in name:
return swap
elif "flip" in name:
return flip
elif "f2" in name:
return f2
elif "insert" in name:
return insert
elif "remove" in name:
return remove
elif "r2" in name:
return remove2
elif "homoglyph" in name:
return homoglyph
else:
print('No transformer function found')
sys.exit(1)