hbutils.reflection.module

mount_pythonpath

hbutils.reflection.module.mount_pythonpath(*path, recover=True, recover_when_replaced=False) → AbstractContextManager[source]
Overview:

Append PYTHONPATH in context, the packages in given paths will be able to be imported. sys.modules will also be recovered when quit.

Parameters:

  • path – Appended python path.

  • recover – Recover the sys.path when context is over, default is True.

  • recover_when_replaced – If sys.path is replaced again, recover it or not, default is False.

Examples::

Here is the testfile directory

>>> import os
>>> os.system('tree test/testfile')
test/testfile
├── dir1
│   ├── gf1.py
├── dir2
│   ├── gf1.py
└── igm
    └── gf1.py

We can import the values from the other directories, like this

>>> from hbutils.reflection import mount_pythonpath
>>> with mount_pythonpath('test/testfile/igm'):
...     from gf1 import FIXED
...     print('FIXED in igm:', FIXED)
FIXED in igm: 1234567
>>>
>>> with mount_pythonpath('test/testfile/dir1'):
...     from gf1 import FIXED
...     print('FIXED in dir1:', FIXED)
FIXED in dir1: 233
>>>
>>> with mount_pythonpath('test/testfile/dir2'):
...     from gf1 import FIXED
...     print('FIXED in dir2:', FIXED)
FIXED in dir2: 455
>>>
>>> from gf1 import FIXED  # cannot import outside
ModuleNotFoundError: No module named 'gf1'