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A decorator and context manager for temporarily modifying os.environ.

Project Description

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A decorator and context manager for temporarily modifying os.environ.

# as a context manager
with modified_environ(added={...}, absent=[...]):
    ...

# as a decorator
@modified_environ(added={...}, absent=[...])

Installation:

$ pip install pollute

modified_environ modifies os.environ in-place, ensuring that all references to it in the code are updated. All changes made by modified_environ are reversed when exiting the context or decorator.

Example

import os
from pollute import modified_environ


assert 'HELLO' not in os.environ
assert 'PATH' in os.environ

with modified_environ(added={'HELLO': 'WORLD'}, absent=['PATH']):
    assert os.environ['HELLO'] == 'WORLD'
    assert 'PATH' not in os.environ

assert 'HELLO' not in os.environ
assert 'PATH' in os.environ

Release history Release notifications

This version
History Node

1.0.2

History Node

1.0.1

History Node

1.0.0

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Filename, size & hash SHA256 hash help File type Python version Upload date
pollute-1.0.2-py2.py3-none-any.whl (3.0 kB) Copy SHA256 hash SHA256 Wheel 2.7 Jan 17, 2015
pollute-1.0.2.tar.gz (2.3 kB) Copy SHA256 hash SHA256 Source None Jan 17, 2015

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