Hi
I am working from within python and want to know the best way to know if a certain package is installed for use on my machine.
I want to know from within python that a specific executable file is on my path where I could actually run the command from a prompt in a system shell.
Look at the function _iscommand() in the webbrowser module, I think it does exactly what you want - it searches the PATH for the file you give it, e.g.
>>> webbrowser._iscommand('python.exe')
True
Kent
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