Question

I have a Python script script.py that has been defined as executable and which begins with the following sha-bang:

#!/usr/bin/env python -W all

But when I call it from the shell, this is what I get:

$ ./script.py 
/usr/bin/env: python -W all: No such file or directory

Calling it directly works though:

$ env python -W all script.py
... some good stuff happens here

What am I doing wrong here?

Answer 1

On a shebang line, you only get one argument. So python -W all is being passed to env as one argument. On the command line, the shell correctly parses the arguments before invoking env.