Django python中 import cStringIO 错误提示 ModuleNotFoundError: No module named 'cStringIO'

Django python中 import cStringIO 错误提示 ModuleNotFoundError: No module named 'cStringIO'

2.x写法：

    import cStringIO

3.x写法：

from io import StringIO

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:

1. from io import StringIO
   
2. from email.generator import Generator
   
3. fp = StringIO()
   
4. g = Generator(fp, mangle_from_=True, maxheaderlen=60)
   
5. g.flatten(msg)
   
6. text = fp.getvalue()
   

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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：

1. from io import StringIO
   
2. from email.generator import Generator
   
3. fp = StringIO()
   
4. g = Generator(fp, mangle_from_=True, maxheaderlen=60)
   
5. g.flatten(msg)
   
6. text = fp.getvalue()

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