Python Practice › OS Module Programs › Program 4

List environment variables

EasyOS Module Programs · 4 of 49

Write a Python program to get the list of environment variables with os.environ.

Output

True
True

Approach

os.environ behaves like a dictionary.

Solution

Python

import os names = sorted(os.environ)print(len(names) > 0)print("PATH" in names)for name in names[:0]:    print(name, "=", os.environ[name])

Output

True
True

Line by line

Line 3

sorted() of the mapping gives the variable names.

Watch out

The loop is limited to [:0] here on purpose: environment values often contain paths, user names and secrets, so print them only on your own machine.

Learn the concept

New to this topic? Read the lesson, then come back.

OS Module lesson → Modules & pip lesson →

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