导入默认的python包，该包已被另一个同名包覆盖

Question

I'm working with a library where they thought it would be a good idea to create a module called json which is not at all like the standard json module

Is there a way of importing the default json module?

Answer 1

You can import any module with an alias. So if they are both named json , you will need to alter the import path.

>>> import sys
>>> hold, sys.path = sys.path, []
>>> # pop whatever json is already imported
>>> sys.modules.pop('json', None)
>>> # import json from system python
>>> import json as python_json
>>> # clean json from sys.module again
>>> del sys.modules['json']
>>> sys.path = hold
>>> # import the 3rd party json
>>> import json as thrid_json

If you don't remove json from sys.modules , it will still conflict on future imports (which could cause problems) but at least you'll have a handle on both of the packages in the one instance (edited to be more explicit after @Kevin's comment).

A good workaround is to monkeypatch the poorly-named module.

Basically, create a module named notjson , and inside of the __init__ take all the desired objects out of third_json and put them in the __init__ namespace.

If you they have a package structure like this: somepackage.json , then you don't need to do anything special except import with from .

>>> import json as python_json
>>> from somepackage import json as third_json

Answer 2

In py2 you can use absolute importing

from __future__ import absolute_import
import json #this imports standard lib json
import mypackage.json as my_json #import custom json module