Mechanize安装后执行报错：AttributeError: 'module'对象无'abc'属性

Hey there, let's sort out this mechanize error you're hitting in Python 3.4. The AttributeError: 'module' object has no attribute 'abc' comes down to a compatibility gap between your installed mechanize version and Python 3.4. Here's the breakdown: the polyglot.py file in mechanize tries to access collections.abc.Mapping, but in Python 3.4, those abstract collection classes live directly under collections (not nested in an abc submodule like they do in newer Python releases).

Here are three solid ways to fix this:

1. Edit the mechanize source file directly (quick fix) #

This gets your current installed version working right away:

• Navigate to C:\Python34\lib\site-packages\mechanize\ and open polyglot.py in a text editor.
• Locate the line around line 120 that reads:

  return isinstance(x, collections.abc.Mapping)
  

• Replace it with this line (compatible with Python 3.4):

  return isinstance(x, collections.Mapping)
  

• Save the file, then re-run your code. This should eliminate the attribute error immediately.

2. Install a mechanize version built for Python 3.4 #

If you'd rather not edit package source code, try installing an older, compatibility-focused version of mechanize:

pip install mechanize==0.4.5

This release was designed to play nice with older Python versions like 3.4.

3. Upgrade your Python version (highly recommended) #

Python 3.4 reached end-of-life back in March 2019, meaning it no longer gets security updates or package compatibility fixes. Upgrading to a supported version (like Python 3.8 or newer) will not only fix this mechanize issue but also prevent similar compatibility headaches with other packages down the line.

Once you've applied one of these fixes, test your code again:

import mechanize
br = mechanize.Browser()

It should run without the AttributeError now.

内容的提问来源于stack exchange，提问作者Phantom Fangs