Print environment variables in python

print_environ.py

#!/usr/bin/env python
"""Print environment variables."""

import os

# print environment variables
for k in os.environ:
    print('%s: %s' % (k, os.environ[k]))

# print environment variables with alphabetical sort
for k in sorted(os.environ):
    print('%s: %s' % (k, os.environ[k]))

# sorted alternative (from http://stackoverflow.com/a/7995743/576371)
for name, value in sorted(os.environ.items()):
    print('%s: %s' % (name, value))

# sorted oneliner (from http://stackoverflow.com/a/7995998/576371)
print('\n'.join('%s: %s' % x for x in sorted(os.environ.items())))

# sorted oneliner alternative
[(k, os.environ[k]) for k in sorted(os.environ)]