Problems passing arguments containing spaces to bash script and then on to python

[Gribouillis]

How do I pass my parameters as needed?

I think it is a bash question instead of a python question. It seems to me that you only need to add quotes around your variables, for example in my bash terminal

Output:
λ foo='hello world'
λ bar="an argument with many spaces"
λ echoargs "$foo" "$bar"
['/home/eric/bin/echoargs', 'hello world', 'an argument with many spaces']
λ echoargs $foo $bar
['/home/eric/bin/echoargs', 'hello', 'world', 'an', 'argument', 'with', 'many', 'spaces']

Here echoargs is a Python script that only prints the arguments that it receives. As you can see, in the first invocation with double quotes "$foo" the shell handles correctly hello world as a single argument, but when I don't use the double quotes, it treats it as two arguments.

Python has nothing to do with this problem because it only receives the arguments that were processed by the shell.