Userscripts default to /bin/python3

[jo-basevi]

Python user scripts with interpreter shebang #!/usr/bin/env python3 are run using /bin/python3 during PBS run jobs. Currently the only way to run python scripts with the same python interpreter used to run payu, is to set user script to a non-executable python file without a header, and the script is run using sys.executable:

payu/payu/fsops.py

Line 32 in 6de3bb5

EXTENSION_TO_INTERPRETER = {'.py': sys.executable,

To run scripts with python executable that is used to run payu, one option could to modify environment variable $PATH on user script subprocess calls with the directory of sys.executable - the python executable used to run payu. An alternative could be to add the existing environment variable$PAYU_PATH to $PATH.

Would welcome any ideas as I am not really sure on the best way to go about this