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Python `-m`

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How -m is invoked

if you have a module foo

write foo/ init.py main.py

then python -m foo will execute main.py


json pretty print

cat some_json_file | python -m json.tool


zipfile.py -l zipfile.zip        # Show listing of a zipfile zipfile.py -t zipfile.zip        # Test if a zipfile is valid zipfile.py -e zipfile.zip target # Extract zipfile into target dir zipfile.py -c zipfile.zip src ... # Create zipfile from sources


python -m gzip wordlist.txt  # Will create wordlist.txt.gz python -m gzip -d wordlist.txt.gz  # Will extract to wordlist.txt


compare two directories

$ python -m filecmp /tmp/a /tmp/b diff /tmp/a /tmp/b Only in /tmp/a : ['1'] Only in /tmp/b : ['2'] Identical files : ['4'] Differing files : ['3']

Several modules lets you encode/decode in various formats:

  • base64
  • uu
  • encodings.rot_13
  • binhex
  • mimify
  • quopri

For example

$ echo 'secertpassword' | python -m encodings.rot_13 frpregcnffjbeq


python -m SimpleHTTPServer # 2 python -m http.server #3

python -m pydoc {module/func}


python -m cProfile script.py python -m timeit script.py python -m pstats script.py python -m trace script.py

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