Is there a recommended format for multi-line imports?

Question

I have read there are three ways for coding multi-line imports in python

With slashes:

from Tkinter import Tk, Frame, Button, Entry, Canvas, Text, \\         


        

Answer 1

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,
)