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How to pass Python command line options (vs arguments) when running script directly vs via Python interpreter?


On Thu, Aug 16, 2018 at 8:32 PM, Thomas Jollans <tjol at tjol.eu> wrote:
> On 2018-08-16 01:05, Chris Angelico wrote:
>> On Thu, Aug 16, 2018 at 8:51 AM, Cameron Simpson <cs at cskk.id.au> wrote:
>>> And as an additional alternative, when I want something weird (extra python
>>> args or the like) I usually make my script.py into a module and invoke it
>>> via a shell script, eg:
>>>
>>>  #!/bin/sh
>>>  exec /particular/python python-opts... -m script_module ${1+"$@"}
>>>
>>> Obviously that'd need a little adaption under Windows.
>>
>> Since an executable file without a shebang should normally be invoked
>> through /bin/sh, you can actually combine this technique into the
>> script itself with a cool hack:
>
> Well, sorta. Executable text files without a shebang line are not
> executable per se, but most shells pretend they are. If you try to run a
> shebang-less script through, say, Python's subprocess module, it won't work.

Good point. Still, for a lot of situations, it does allow you to
invoke the .py file. I wonder if there's some sort of sneaky way to
make the exec line appear as a comment to Python - probably involving
quoting rules.

ChrisA