Script inline constructor is flakey

[mshatkhin23]

Tried generating a script template with something like this:

@script()
def echo(message: str) -> None:  # pragma: no cover
    """Prints out a message."""
    print(message)

and got something like this:

source: "import os\nimport sys\nsys.path.append(os.getcwd())\nimport json\n\
        try: message = json.loads(r'''{{inputs.parameters.message}}''')\nexcept: message\
        \ = r'''{{inputs.parameters.message}}'''\n\ndef echo(message: str) -> None:\
        \  # pragma: no cover\n    \"\"\"Prints out a message.\"\"\"\n    # TODO Remove\
        \ function or replace with your logic\n    print(message)\n"

This seems to be because of the reliance on the function signature ending with a :\n string, from the code here.

[mshatkhin23]

@samj1912

[sambhav]

potential solution is to switch to one of https://stackoverflow.com/questions/38050649/getting-a-python-functions-source-code-without-the-definition-lines