解决Python模块报错：ModuleNotFoundError: No module named 'cStringIO'

原作者遇到了跟我一样的问题，我也是在执行下面代码：

import cStringIO

时提示报错为：

ModuleNotFoundError: No module named 'cStringIO'

文中答复给出的解决方案是：

From Python 3.0 changelog;
The StringIO and cStringIO modules are gone. Instead, import the io module and use io.StringIO or io.BytesIO for text and data respectively.
From the Python 3 email documentation it can be seen that io.StringIO should be used instead:
from io import StringIO
from email.generator import Generator
fp = StringIO()
g = Generator(fp, mangle_from_=True, maxheaderlen=60)
g.flatten(msg)
text = fp.getvalue()

Reference:  https://docs.python.org/3.4/library/io.html

意思是说：

从Python 3.0开始，StringIO和cStringIO模块已经取消。通过import io模块代替，分别使用io.String或io.BytesIO处理文本和数据。从Python 3邮件流文档能看到相关实现StringIO的代码为：

from io import StringIO
from email.generator import Generator
fp = StringIO()
g = Generator(fp, mangle_from_=True, maxheaderlen=60)
g.flatten(msg)
text = fp.getvalue()

参考文档地址： https://docs.python.org/3.4/library/io.html

原文地址：https://stackoverflow.com/questions/28200366/python-3-4-0-email-package-install-importerror-no-module-named-cstringio