I highly recommend argparse which comes with Python 2.7 and later.. The argparse module reduces boiler plate code and makes your code more robust, because the module handles all standard use cases (including subcommands), generates the help and usage for you, checks and sanitize the user input - all stuff you have to worry about when you are using sys.argv approach.

The goals here are to be terse, each argument parsed by a single line, the args line up for readability, the code is simple and doesn't depend on any special modules (only os + sys), warns about missing or unknown arguments gracefully, use a simple for/range() loop, and works across python 2.x and 3.x

In Python, how can we find out the command line arguments that were provided for a script, and process them? Related background reading: What does "sys.argv[1]" mean? (What is sys.argv, and where does it come from?) .

sys.arg is a list of command line parameters. You need to actually pass command line parameters to the script to populate this list. Do this either in your IDE's project settings or by running like this on the command line: python script.py first second third Note that the first argument is always the script's name (python script.py in this case).

Aug 31, 2011 · For a posixy feel, you shouldn't only provide the standard command line options, both short and long, but also, if possible, adhere to reading from the standard input (or the command line) and writing to the standard output, and only overriding the output with an option (like -o/--output). That's what one expects of most GNU command line tools.

In command line I am able to pass arguments to a python file as: python script.py arg1 arg2 I can than retrieve arg1 and arg2 within script.py as: import sys arg1 = sys.argv[1] arg2 = sys.argv[2] However, I would like to send keyword arguments to a python script, and retrieve them as a dictionary: python script.py key1=value1 key2=value2

Aug 8, 2018 · For an example of object comparison mayhem, try removing the int() call in section 6.1.1. of the Python tutorial Fibonacci code and you'll get an infinite loop, since the while loop condition becomes: 'int' < 'string'. (This would not happen in Perl, btw). Great advice from @Jan-Philip above to validate command-line arguments, even for Python 3.

Jan 18, 2010 · How to pass an array to python through command line - Stack Overflow. I’m answering that question: The arguments on the command line are strings, they're not parsed like literals in the program. argv construct the strings automatically to a list from command line arguments (as separated by spaces), in short, sys.argv is a list.

Oct 12, 2016 · Off course, in a real script, you won't hard-code the command-line options and will call parser.parse_args() (without argument) instead. It will make argparse take the sys.args list as command-line arguments. You will be able to call this script this way:

Feb 11, 2014 · command line arguments using python. 2. How to pass Bash variables as Python arguments. 0. Commandline ...