/usr/bin/env: ‘python3.9\r’: No such file or directory code example

Example: /usr/bin/env: ‘python\r’: No such file or directory

I just resolved that issue. Your current file is "CR" type or any thing else, 
so you have to open that file by notepad++ or any editor and convert that
to "LF". Notepad++: Edit menu -> EOL Conversion -> Unix (LF), and then save
that Pic: i.imgur.com/paAPYsK.png Hope it useful for you guys.