The os module contains an interface to operating system-specific functions. this module can be used to access environment variables.
We can go with os.environ to get the value of environment variable.
import os
print os.environ['HOME']
but there is a catch, this method will raise KeyError variable does not exist
>>> print os.environ['HOME_NOT_EXIST']
Traceback...
Educating yourself does not mean that you were stupid in the first place; it means that you are intelligent enough to know that there is plenty left to 'learn'. -Melanie Joy
Sunday, 3 February 2013
All about variables/parameters in shell
Stripping Variable Strings By length:
Syntax: ${parameter:starting_index:number_of_chars}
${variable:3} # foobar becomes bar
${variable:3:2} # foobar becomes ba
${variable: -4} # foobar becomes obar
Upper and lower case :
y="this IS small"
echo "${y^^}"
THIS IS SMALL
y="THIS is BIG"
echo "${y,,}"
this is big
Removing a Part:
name=${var#removepat}
This will...