Is there a recommended format for multi-line imports?
Solution 1:
Personally I go with parentheses when importing more than one component and sort them alphabetically. Like so:
from Tkinter import (
Button,
Canvas,
DISABLED,
END,
Entry,
Frame,
LEFT,
NORMAL,
RIDGE,
Text,
Tk,
)
This has the added advantage of easily seeing what components have been added / removed in each commit or PR.
Overall though it's a personal preference and I would advise you to go with whatever looks best to you.
Solution 2:
Your examples seem to stem from PEP 328. There, the parenthesis-notation is proposed for exactly this problem, so probably I'd choose this one.
Solution 3:
I would go with the parenthesis notation from the PEP328 with newlines added before and after parentheses:
from Tkinter import (
Tk, Frame, Button, Entry, Canvas, Text,
LEFT, DISABLED, NORMAL, RIDGE, END
)
This is the format which Django uses:
from django.test.client import Client, RequestFactory
from django.test.testcases import (
LiveServerTestCase, SimpleTestCase, TestCase, TransactionTestCase,
skipIfDBFeature, skipUnlessAnyDBFeature, skipUnlessDBFeature,
)
from django.test.utils import (
ignore_warnings, modify_settings, override_settings,
override_system_checks, tag,
)