python argparse tutorial (beginner - intermediate) anthony explains #044

today I explain some of the basics of argument parsing in python with the argparse module!

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I won't ask for subscriptions / likes / comments in videos but it really helps the channel. If you have any suggestions or things you'd like to see please comment below!

[adwaithrajesh]

The best video on argparse that I've ever seen. Really great video. Thanks for sharing.

[theendlessriver]

Awesome Video again! The subparsers were new to me. Now I know how they work ;-)
I personally like using in the initial parser definition so the default is always displayed in the help when there is one.
Keep up the great work!

[itsdinguskhan]

I was attempting to put together my own way to parse arguments, until I came across argparse. Then I happened upon your video, which was very informative and helpful! Big thumbs up for this!

[DavidDellsperger]

David: *talks about how he's working on a python CLI during stream*
Anthony (who writes code, btw): "Have you seen my argparse wideo?"
YouTube: "Hey David, checkout this cool video from Mr. Writes code about argparse
David: "THE AI IS TOO GOOD, HOW DID IT CROSS INTO TWITCH?"

[gatorduck]

This made argparse click and make sense

[nilsmuller]

Great video Anthony, I'll definitely use it as my go-to recommendation for people new to argparse. :)

Regarding the `action='append'` use case: I was writing a port scanner the other day and knowing of it would've helped me a lot. :D This way you can specify multiple ports or multiple target machines.

[a_maxed_out_handle_of__chars]

wow, just wow. Thank you and subbed :)

[tommacnamara]

Perhaps added to argparse after this video was published but I've recently discovered and it's wonderful. For example if you add an argument "--save-output" you can call --save-output and it will be set to True or you can call "--no-save-output" and it will be set to False. Very useful feature

[ahmedahmedx]

That was the best explanation i ever seen about argparse, thank you sir.

Sir what about how to check them ? I mean check if "status" and "--force" defined and do some code upon that.

[muddasirkhan]

Thanks, Anthony. What are your goto standard libraries while playing with text files or text parsing or generally working with text? (Asking this as an infra eng handling servers) maybe a playlist of videos would definitely be helpful if you kindly do plan your future topics :)

[ingtob]

What is the purpose of subparsers? Are they simply grouping arguments?

[dd-rvxs]

Is there a way to store multiple names under 1 argument name? For example instead of typing --log multiple times type --log 1.log 2.log etc.

[jake]

Hi Anthony! Is there a way to create a CLI that accepts arbitrary arguments the same way that a python function can accept kwargs?

[DennisZIyanChen]

What IDE do you use to write your code and you have your command line open on a separate window and not part of IDE, correct?

[vitamind_forme]

Code does not work in beginning: TypeError: main() missing 1 required positional argument: 'argv' This happens even after I type python parse.py hello world

[tsankailieva]

The video is very helpful. Thank a ton!
Can you advise on the following: I'm trying to get the string 'price<20' using argparse. Or of it I have to extract 'price' '<' and '20'. I have done it, but is there a way to use choices or custom type to return error of the string does not match required parameters? If user inputs 'value%-4' for example.

[akshaymestry]

Hello AWC, this is certainly my goto tutorial for refreshing my knowledge on argparse. I'm working on a piece of code which would need an optional-positional file. But I don't want to use short/long options for it. Any idea how to do that? I want something like python's argparsing thingy... if I do $ python3 ... this invokes the python interpreter but if I do $ python3 t.py it executes the script. How to implement this optional-positional (script) argument?

[talalkalai]

any thoughts about 'click' pkg?

[skarfie]

It's not in standard library but I highly recommend typer over argparse.