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I needed to have a directly executable python script, so i started the file with #!/usr/bin/env python. However, I also need unbuffered output, so i tried #!/usr/bin/env python -u, but that fails with python -u: no such file or directory.
I found out that #/usr/bin/python -u works, but I need it to get the python in PATH to support virtual env environments.
What are my options?
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The special syntax *args in function definitions in python is used to pass a variable number of arguments to a function. It is used to pass a non-key worded, variable-length argument list. The syntax is to use the symbol * to take in a variable number of arguments; by convention, it is often used with the word args.
5 Types of Arguments in Python Function Definition:positional arguments. arbitrary positional arguments. arbitrary keyword arguments.
Hence, we conclude that Python Function Arguments and its three types of arguments to functions. These are- default, keyword, and arbitrary arguments.
If you want to pass named string arguments containing spaces in between to the python script, you can simply put the text in double quotes.
In some environment, env doesn't split arguments. So your env is looking for python -u in your path. We can use sh to work around. Replace your shebang with the following code lines and everything will be fine.
#!/bin/sh ''''exec python -u -- "$0" ${1+"$@"} # ''' # vi: syntax=python p.s. we need not worry about the path to sh, right?
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It is better to use environment variable to enable this. See python doc : http://docs.python.org/2/using/cmdline.html
for your case:
export PYTHONUNBUFFERED=1 script.py If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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