宏环境变量无法在python中访问

Question

in perl, reference the environment variables with:

print "$ENV{NAGIOS_HOSTNAME}\n";

In bash, reference the environment variables with:

echo $NAGIOS_HOSTNAME

i'm trying to access the environment variables using os.environ['NAGIOS_HOSTNAME']

Below is the error

host_nagio=os.environ['NAGIOS_HOSTGROUPNAME']

` Traceback (most recent call last):
  File "Read_nagios_parm.py", line 6, in <module>
    host_nagio= os.environ['NAGIOS_HOSTGROUPNAME']
  File "/usr/lib/python2.7/UserDict.py", line 23, in __getitem__
    raise KeyError(key)
KeyError: 'NAGIOS_HOSTGROUPNAME'`

How can i access the marco environment variables of nagios using python.

This seems to be a simple error in which i need to export.

Answer 1

From the documentation :

os.environ

A mapping object [...]

os.environ['NAGIOS_HOSTGROUPNAME']