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in Python by (47.6k points)

It seems to me like the files run the same without that line.

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  • If you have installed many versions of Python, then #!/usr/bin/env ensures that the interpreter will use the first installed version on your environment's $PATH

  • If you are using Unix, an executable file that is meant to be interpreted can indicate what interpreter to use by having a #! at the start of the first line, followed by the interpreter (and any flags it may need).

  • For any other operating systems, of course, this rule does not apply (but that "shebang line" does no harm, and will help if you ever copy that script to a platform with a Unix base, such as Linux, Mac, etc).



 

by (100 points)
Where should I write it? (I am a beginner)

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