Shell Interaction in Python: Difference between revisions
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=Command Line Argument Processing= | =Command Line Argument Processing= | ||
[[Python_Language_Modularization#Standalone_Program|Standalone Python programs]] often needs to handle command line arguments. | |||
<code>[[Python_Module_sys#sys.argv|sys.argv]]</code> is the list containing arguments as strings. | |||
The path of the script being executed is available on position 0. | |||
<syntaxhighlight lang='python'> | <syntaxhighlight lang='python'> | ||
import sys | import sys | ||
print(f"Arguments count: {len(sys.argv)}") | |||
for i, arg in enumerate(sys.argv): | |||
print(f"Argument {i:>1}: {arg}") | |||
</syntaxhighlight> | |||
<font color=darkkhaki>Also explore <code>[[Python_Package_argparse|argparse]]</code>.</font> | |||
</ | |||
=Execute an O/S Command= | =Execute an O/S Command= | ||
==Execute an O/S Command with the <tt>subprocess</tt> Module== | ==Execute an O/S Command with the <tt>subprocess</tt> Module== | ||
{{Internal|Python_Module_subprocess#Execute_an_O.2FS_Command|Execute an O/S Command with the <tt>subprocess</tt> Module}} | |||
==Other Methods== | |||
<font color=darkkhaki>TO PROCESS: | |||
* https://janakiev.com/blog/python-shell-commands/ | |||
* https://amoffat.github.io/sh/ | |||
</font> | |||
=Organizatorium= | =Organizatorium= | ||
Latest revision as of 02:06, 8 July 2022
Internal
Command Line Argument Processing
Standalone Python programs often needs to handle command line arguments.
sys.argv is the list containing arguments as strings.
The path of the script being executed is available on position 0.
import sys
print(f"Arguments count: {len(sys.argv)}")
for i, arg in enumerate(sys.argv):
print(f"Argument {i:>1}: {arg}")
Also explore argparse.
Execute an O/S Command
Execute an O/S Command with the subprocess Module
Other Methods
TO PROCESS:
Organizatorium
from shutil import which
commands={
"aws": "awscli",
"aws-login": "aws-login",
"aws-eks-configure": "aws-eks-configure"
}
for c in commands:
print("{:20}{:7}".format(commands[c], "OK" if which(c) else "missing"))