os.getenv和os.environ.get之间的区别 [英] Difference between os.getenv and os.environ.get

问题描述

两种方法之间是否有任何区别?

Is there any difference at all between both approaches?

>>> os.getenv('TERM')
'xterm'
>>> os.environ.get('TERM')
'xterm'

>>> os.getenv('FOOBAR', "not found") == "not found"
True
>>> os.environ.get('FOOBAR', "not found") == "not found"
True

它们似乎具有完全相同的功能.

They seem to have the exact same functionality.

推荐答案

观察到一个差异(Python27):

One difference observed (Python27):

os.environ会引发异常. os.getenv不会引发异常，但返回None

os.environ raises an exception if the environmental variable does not exist. os.getenv does not raise an exception, but returns None

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