Python Tutorials: List of python3 Options and arguments command lines

usage: /Library/Frameworks/Python.framework/Versions/3.8/bin/python3 [option] … [-c cmd | -m mod | file | -] [arg] …

Options and arguments (and corresponding environment variables):

-b : issue warnings about str(bytes_instance), str(bytearray_instance)
and comparing bytes/bytearray with str. (-bb: issue errors)
-B : don’t write .pyc files on import; also PYTHONDONTWRITEBYTECODE=x
-c cmd : program passed in as string (terminates option list)
-d : debug output from parser; also PYTHONDEBUG=x
-E : ignore PYTHON* environment variables (such as PYTHONPATH)
-h : print this help message and exit (also –help)
-i : inspect interactively after running script; forces a prompt even
if stdin does not appear to be a terminal; also PYTHONINSPECT=x
-I : isolate Python from the user’s environment (implies -E and -s)
-m mod : run library module as a script (terminates option list)
-O : remove assert and debug-dependent statements; add .opt-1 before
.pyc extension; also PYTHONOPTIMIZE=x
-OO : do -O changes and also discard docstrings; add .opt-2 before
.pyc extension
-q : don’t print version and copyright messages on interactive startup
-s : don’t add user site directory to sys.path; also PYTHONNOUSERSITE
-S : don’t imply ‘import site’ on initialization
-u : force the stdout and stderr streams to be unbuffered;
this option has no effect on stdin; also PYTHONUNBUFFERED=x
-v : verbose (trace import statements); also PYTHONVERBOSE=x
can be supplied multiple times to increase verbosity
-V : print the Python version number and exit (also –version)
when given twice, print more information about the build
-W arg : warning control; arg is action:message:category:module:lineno
-x : skip first line of source, allowing use of non-Unix forms of #!cmd
-X opt : set implementation-specific option
–check-hash-based-pycs always|default|never:
control how Python invalidates hash-based .pyc files
file : program read from script file
: program read from stdin (default; interactive mode if a tty)
arg …: arguments passed to program in sys.argv[1:]

Rajesh Kumar
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