Python Command Line Options List
The complete list of command line options
-b
Issue warnings for calling str() with a bytes or bytearray object and no encoding argument, and comparing a bytes or bytearray with a str. Option -bb issues errors instead.
-B
Do not write .pyc or .pyo byte-code files on imports.
-d
Turn on parser debugging output (for developers of the Python core).
-E
Ignore Python environment variables described ahead (such as PYTHONPATH).
-h
Print help message and exit.
-i
Enter interactive mode after executing a script. Hint: useful for postmortem debugging; see also pdb.pm(), described in Python’s library manuals.
-O
Optimize generated byte code (create and use .pyo byte-code files). Currently yields a minor performance improvement.
-OO
Operates like -O, the previous option, but also removes docstrings from byte code.
-q
Do not print version and copyright message on interactive startup (as of Python 3.2).
-s
Do not add the user site directory to the sys.path module search path.
-S
Do not imply “import site” on initialization.
-u
Force stdout and stderr to be unbuffered and binary.
-v
Print a message each time a module is initialized, showing the place from which it is loaded; repeat this flag for more verbose output.
-V
Print Python version number and exit (also available as --version).
-W arg
Warnings control: arg takes the form action:message: category:module:lineno. See also “Warnings Framework” and “Warning Category Exceptions” ahead, and the warn ings module documentation in the Python Library Reference manual (available at http://www.python.org/doc/).
-x
Skip first line of source, allowing use of non-Unix forms of
#!cmd.
-X option
Set implementation-specific option (as of Python 3.2); see implementation documentation for supported option values.
-b
Issue warnings for calling str() with a bytes or bytearray object and no encoding argument, and comparing a bytes or bytearray with a str. Option -bb issues errors instead.
-B
Do not write .pyc or .pyo byte-code files on imports.
-d
Turn on parser debugging output (for developers of the Python core).
-E
Ignore Python environment variables described ahead (such as PYTHONPATH).
-h
Print help message and exit.
-i
Enter interactive mode after executing a script. Hint: useful for postmortem debugging; see also pdb.pm(), described in Python’s library manuals.
-O
Optimize generated byte code (create and use .pyo byte-code files). Currently yields a minor performance improvement.
-OO
Operates like -O, the previous option, but also removes docstrings from byte code.
-q
Do not print version and copyright message on interactive startup (as of Python 3.2).
-s
Do not add the user site directory to the sys.path module search path.
-S
Do not imply “import site” on initialization.
-u
Force stdout and stderr to be unbuffered and binary.
-v
Print a message each time a module is initialized, showing the place from which it is loaded; repeat this flag for more verbose output.
-V
Print Python version number and exit (also available as --version).
-W arg
Warnings control: arg takes the form action:message: category:module:lineno. See also “Warnings Framework” and “Warning Category Exceptions” ahead, and the warn ings module documentation in the Python Library Reference manual (available at http://www.python.org/doc/).
-x
Skip first line of source, allowing use of non-Unix forms of
#!cmd.
-X option
Set implementation-specific option (as of Python 3.2); see implementation documentation for supported option values.
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