gmail和python脚本错误

Question

我试图运行这段产生错误的代码：

#!/usr/bin/python

import smtplib
msg = 'Hello world.'

server = smtplib.SMTP('smtp.gmail.com',587) #port 465 or 587
server.ehlo()
server.starttls()
server.ehlo()
server.login('me@gmail.com','pass')
server.sendmail('me@gmail.com','someoneelse@gmail.com',msg)
server.close()

这是错误：

Traceback (most recent call last):
  File "sendmail2.py", line 2, in <module>
    import smtplib
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/smtplib.py", line 163, in <module>
    import ssl
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/ssl.py", line 58, in <module>
    import textwrap
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/textwrap.py", line 32, in <module>
    class TextWrapper:
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/textwrap.py", line 74, in TextWrapper
    whitespace_trans = string.maketrans(_whitespace, ' ' * len(_whitespace))
AttributeError: 'module' object has no attribute 'maketrans

我想知道问题是什么？在我看来，如果smtplib被破坏了，为什么呢？