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Python: Get the users environment

Python Basic: Exercise-105 with Solution

Write a Python program to get the users environment.

Sample Solution-1:

Python Code:

import os
print()
print(os.environ)
print()

Sample Output:

environ({'SHLVL': '3', 'COMP_WORDBREAKS': ' \t\n"\'><;|&(:', 'LESSC
LOSE': '/usr/bin/lesspipe %s %s', 'TERM': 'xterm', 'LS_COLORS': 'rs
=0:di=01;34:ln=01;36:mh=00:pi=40;33:so=01;35:do=01;35:bd=40;33;01:c
d=40;33;01:or=40;31;01:mi=00:su=37;41:sg=30;43:ca=30;41:tw=30;42:ow
=34;42:st=37;44:ex=01;32:*.tar=01;31:*.tgz=01;31:*.arc=01;31:*.arj=
01;31:*.taz=01;31:*.lha=01;31:*.lz4=01;31:*.lzh=01;31:*.lzma=01;31:
*.tlz=01;31:*.txz=01;31:*.tzo=01;31:*.t7z=01;31:*.zip=01;31:*.z=01;
31:*.Z=01;31:*.dz=01;31:*.gz=01;31:*.lrz=01;31:*.lz=01;31:*.lzo=01;
31:*.xz=01;31:*.bz2=01;31:*.bz=01;31:*.tbz=01;31:*.tbz2=01;31:*.tz=
01;31:*.deb=01;31:*.rpm=01;31:*.jar=01;31:*.war=01;31:*.ear=01;31:*
.sar=01;31:*.rar=01;31:*.alz=01;31:*.ace=01;31:*.zoo=01;31:*.cpio=0
1;31:*.7z=01;31:*.rz=01;31:*.cab=01;31:*.jpg=01;35:*.jpeg=01;35:*.g
if=01;35:*.bmp=01;35:*.pbm=01;35:*.pgm=01;35:*.ppm=01;35:*.tga=01;3
5:*.xbm=01;35:*.xpm=01;35:*.tif=01;35:*.tiff=01;35:*.png=01;35:*.sv
g=01;35:*.svgz=01;35:*.mng=01;35:*.pcx=01;35:*.mov=01;35:*.mpg=01;3
5:*.mpeg=01;35:*.m2v=01;35:*.mkv=01;35:*.webm=01;35:*.ogm=01;35:*.m
p4=01;35:*.m4v=01;35:*.mp4v=01;35:*.vob=01;35:*.qt=01;35:*.nuv=01;3
5:*.wmv=01;35:*.asf=01;35:*.rm=01;35:*.rmvb=01;35:*.flc=01;35:*.avi
-------
PATH': '/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bi
n:/usr/games:/usr/local/games', 'SSH_TTY': '/dev/pts/0', '_': '/usr
/bin/timeout'})

Sample Solution-2:

Python Code:

import os
import pprint
# User's environment variables
u_env_var = os.environ
print("User's Environment variable:")
pprint.pprint(dict(u_env_var), width = 1)

Sample Output:

User's Environment variable:
{'DEBIAN_FRONTEND': 'teletype',
 'HOME': '/root',
 'HOSTNAME': '0c299cb8f897',
 'LANG': 'en_US.UTF-8',
 'LANGUAGE': 'en_US:en',
 'LC_ALL': 'en_US.UTF-8',
 'MPLBACKEND': 'module://trinket_backend',
 'NODE_APP_INSTANCE': '0',
 'PATH': '/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin',
 'PM2_DISCRETE_MODE': 'true',
 'PM2_HOME': '/root/.pm2',
 'PM2_INTERACTOR_PROCESSING': 'true',
 'PM2_PROGRAMMATIC': 'true',
 'PYTHONPATH': '/trinket/python3',
 'TERM': 'xterm',
 'automation': 'true',
 'autorestart': 'true',
 'axm_actions': '',
 'axm_dynamic': '[object '
                'Object]',
 'axm_monitor': '[object '
                'Object]',
 'axm_options': '[object '
                'Object]',
 'created_at': '1621962710174',
 'env': '[object '
        'Object]',
 'exec_interpreter': 'node',
 'exec_mode': 'fork_mode',
 'exit_code': '0',
 'instance_var': 'NODE_APP_INSTANCE',
 'instances': '1',
 'kill_retry_time': '100',
 'km_link': 'false',
 'merge_logs': 'true',
 'name': 'shell',
 'node_args': '',
 'node_version': '8.11.3',
 'pm_cwd': '/trinket-workdir',
 'pm_err_log_path': '/dev/null',
 'pm_exec_path': '/trinket-workdir/server/python3/shell.js',
 'pm_id': '0',
 'pm_out_log_path': '/dev/null',
 'pm_pid_path': '/root/.pm2/pids/shell-0.pid',
 'pm_uptime': '1622796325496',
 'pmx': 'true',
 'restart_time': '28',
 'status': 'launching',
 'treekill': 'true',
 'unique_id': '27a8b1a2-c622-4bdb-8745-f55efe2dac0a',
 'unstable_restarts': '0',
 'username': 'root',
 'version': '0.0.0',
 'versioning': 'null',
 'vizion': 'true',
 'vizion_running': 'false',
 'windowsHide': 'true'}

Accessing a specific environment variable:

Python Code:

import os
host_name = os.environ['HOSTNAME']
print("HOSTNAME:", host_name)
python_path = os.environ.get('PYTHONPATH')
print("Python Path:", python_path)

Sample Output:

HOSTNAME: 4735090b6baa
Python Path: /trinket/python3

Python Code Editor:

 

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Python: Tips of the Day

Unpack variables from iterable:

# One can unpack all iterables (tuples, list etc)
>>> a, b, c = 1, 2, 3
>>> a, b, c
(1, 2, 3)

>>> a, b, c = [1, 2, 3]
>>> a, b, c
(1, 2, 3)