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Im trying to write a python program that I will run at the command line. I'd like the program to take a single input variable. Specifically, I would use a date in the form of 2014-01-28 (yyyy-mm-dd):
e.g. python my_script.py 2014-01-28
It seems argparse might be able to help me but I have found very little documentation regarding the module. Does anyone have experience with something like this?
865
ArgumentParser() initializes the parser so that you can start to add custom arguments. To add your arguments, use parser. add_argument() . Some important parameters to note for this method are name , type , and required .
argparse — parse the arguments. Using argparse is how you let the user of your program provide values for variables at runtime. It's a means of communication between the writer of a program and the user.
The argparse module makes it easy to write user-friendly command-line interfaces. It parses the defined arguments from the sys. argv . The argparse module also automatically generates help and usage messages, and issues errors when users give the program invalid arguments.
There's lots of documentation in the standard library, but generally, something like:
import argparse import datetime parser = argparse.ArgumentParser() parser.add_argument( 'date', type=lambda s: datetime.datetime.strptime(s, '%Y-%m-%d'), ) # For testing. Pass no arguments in production args = parser.parse_args(['2012-01-12']) print(args.date) # prints datetime.datetime object If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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