Suppose that function some_descriptively_named_function returns a 4-tuple of 4 return parameters. I want to call some_descriptively_named_function, adhere to the 80-character line length limit, and unpack all 4 outputs each into a descriptively-named variable:
some_desc_name1, some_desc_name2, some_desc_name3, some_desc_name4 = some_descriptively_named_function()
One option is:
some_desc_name1, some_desc_name2, some_desc_name3, some_desc_name4 = (
some_descriptively_named_function()
)
With four unpacked values, though, even this can be pushing it for line length. And if I wanted to make a brief comment on each argument, it's not easy to lay it out nicely.
The following works but it's unclear if this is considered good or very bad.
(some_desc_name1, # Comment 1
some_desc_name2, # Comment 3
some_desc_name3, # Comment 3
some_desc_name4 # Comment 4
) = some_descriptively_named_function()
It's certainly good for line length, but it's weird trying to think of how PEP8 might apply to the parentheses happening right at the beginning of a line.
Is there an established (hopefully PEP8 related) Python style guideline for this?
Your format LGTM, but a couple suggestions:
(some_desc_name1,
some_desc_name2,
some_desc_name3,
some_desc_name4) = some_descriptively_named_function()
some_descriptively_named_function() should define these clearly.