Question: I need help with argparse in python. How do I make it so that the only valid inputs using argparse are: Positive float numbers. Binary

I need help with argparse in python. How do I make it so that the only valid inputs using argparse are:

Positive float numbers.

Binary operators: /, *, -, +

And "sqrt" for square root.

No negative numbers or letters(besides "sqrt"). And print an error if it detects an invalid input.

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