TypeError: 'in <string>' requires string as left operand, not int

• 报错

Traceback (most recent call last):
  File "D:/PyCharm 5.0.3/WorkSpace/2.NLP/9.DL在NLP中的应用/4. VectorizerVisualization.py", line 45, in <module>
    lines.append(preprocessing(line))
  File "D:/PyCharm 5.0.3/WorkSpace/2.NLP/9.DL在NLP中的应用/4. VectorizerVisualization.py", line 18, in preprocessing
    text2 = ' '.join(' '.join([' ' if ch in string.punctuation else ch for ch in text]).split())
  File "D:/PyCharm 5.0.3/WorkSpace/2.NLP/9.DL在NLP中的应用/4. VectorizerVisualization.py", line 18, in <listcomp>
    text2 = ' '.join(' '.join([' ' if ch in string.punctuation else ch for ch in text]).split())
TypeError: 'in <string>' requires string as left operand, not int

• 原因
  需要字符串作为左操作数，而不是int
• 解决
  line = line.strip().decode("ascii", "ignore").encode("utf-8")
  这句话不知道为什么有问题，所以将打开文件的'rb'改成'r',并注释掉了这句话