Linux os.environ 不显示一些变量
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os.environ doesn't show some variables
提问by pbanka
I have an environment variable that I set (on Centos 6) using profile.d, as follows:
我有一个使用 profile.d 设置的环境变量（在 Centos 6 上），如下所示：
[bankap@tnt-integration-test ~]$ cat /etc/profile.d/tnt.sh
TNT_SERVER_URL=http://tnt-integration-test:8000/
and when I log in, I see the variable:
当我登录时，我看到了变量：
[bankap@tnt-integration-test ~]$ echo $TNT_SERVER_URL
http://tnt-integration-test:8000/
But when I access the thing with Python, the environment variable doesn't show up!
但是当我用Python访问这个东西时，环境变量没有出现！
[bankap@tnt-integration-test ~]$ python -c 'import os;os.environ.get("TNT_SERVER_URL")'
Traceback (most recent call last):
File "<string>", line 1, in <module>
NameError: name 'TNT_SERVER_URL' is not defined
I've even tried using the ctypes library with the same results:
我什至尝试使用 ctypes 库得到相同的结果：
>>> os.getenv('TNT_SERVER_URL')
>>> from ctypes import CDLL, c_char_p
>>> getenv = CDLL('libc.so.6').getenv
>>> getenv('TNT_SERVER_URL')
0
>>>
But other variables come through just fine...
但是其他变量也很好...
os.environ {'SSH_ASKPASS': '/usr/libexec/openssh/gnome-ssh-askpass', 'LESSOPEN': '|/usr/bin/lesspipe.sh %s', 'SSH_CLIENT': '139.126.176.137 56535 22', 'SELINUX_USE_CURRENT_RANGE': '', 'LOGNAME': 'bankap', 'USER': 'bankap', 'QTDIR': '/usr/lib64/qt-3.3', 'PATH': '/usr/lib64/qt-3.3/bin:/usr/local/bin:/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/sbin:/home/bankap/bin',
os.environ {'SSH_ASKPASS'：'/usr/libexec/openssh/gnome-ssh-askpass'，'LESSOPEN'：'|/usr/bin/lesspipe.sh %s'，'SSH_CLIENT'：'139.126.176.137 56535 22'，'SELINUX_USE_CURRENT_RANGE'：''，'LOGNAME'：'bankap'，'USER'：'bankap'，'QTDIR'：'/usr/lib64/qt-3.3'，'PATH'：'/usr/lib64 /qt-3.3/bin:/usr/local/bin:/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/sbin:/home/bankap/bin',
Anybody have any ideas? I've never seen this before!
有人有任何想法吗？我以前从未见过这个！
采纳答案by SingleNegationElimination
You have a quoting problem:
你有一个引用问题：
change
改变
python -c 'import os;os.environ.get('TNT_SERVER_URL')'
into
进入
python -c 'import os;os.environ.get("TNT_SERVER_URL")'
^ ^
You also (probably) need to exportthe variable:
您还（可能）需要export变量：
export TNT_SERVER_URL; python -c 'import os;os.environ.get("TNT_SERVER_URL")'
