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I am trying to understand this side of the python where we execute Python from commandline and input a specific file or asking to perform specific task. Presently I wanted to input a file like this

# input a file 
c:>python main_file.py -f input1.txt
# output a file
c:>python main_file.py -o output1.txt
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  • Are -f and -o standard command line arguments to python or just your main_file.py script? Commented Oct 14, 2021 at 12:36
  • @eugenhu Ok. If there are no such standard command-line arguments, please treat it just for my script. Commented Oct 14, 2021 at 13:01
  • Not quite sure what you're asking then, could you rephrase? Do you mean how to retrieve the arguments in your script, e.g. sys.argv()? Commented Oct 14, 2021 at 13:01
  • @eugenhu My apologies. I have also no idea whether these are standard commands from Python. I just heard them. I was saying, if there are no such Python commands, please treat it just for my script (as If I have to design my script in such a way that it responds to -f or -o commands). Commented Oct 14, 2021 at 13:04
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    Alright I'm going to take a shot in the dark and say you're looking for help on how to parse command line arguments in python scripts, in this case have a look at What's the best way to parse command line arguments?. The basics is to just look at the elements in sys.argv, for starters just have your main_file.py script be print(sys.argv) to see what it contains. Commented Oct 14, 2021 at 13:08
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