How to fetch environment variables in Mac OS X using python?

Question

How can I lookup environment variables (e.g. export HG_USER from .profile) using python code in Mac OS X?

What have you tried? Please post the code you tried and the error you're getting. — S.Lott, Jan 26 '11 at 19:23

score 11 · Accepted Answer · answered Jan 26 '11 at 19:10

11

os.environ is a dictionary containing all the environment variables. You need to import os before you can use it. So, for example HG_USER would be accessed by os.environ['HG_USER'].

answered Jan 26 '11 at 19:10

Vlad H

3,629
1
19
13

score 2 · Answer 2 · answered Jan 26 '11 at 19:11

2

Use the os module:

import os
os.environ

Returns a dictionary with the environment variables as keys.

answered Jan 26 '11 at 19:11

Michael J. Barber

24,518
9
68
88

score 2 · Answer 3 · answered Jan 26 '11 at 19:11

2

Use os:

>>> import os
>>> print os.environ["PATH"]

answered Jan 26 '11 at 19:11

Pablo Santa Cruz

176,835
32
241
292

score 1 · Answer 4 · answered Jan 26 '11 at 19:20

1

You can also the helper function os.getenv(varname[, value]) which will return the value of environment variable varname, and if it not present will return value which defaults to None

answered Jan 26 '11 at 19:20

Senthil Kumaran

54,681
14
94
131

How to fetch environment variables in Mac OS X using python?

4 Answers4