* Write one import per line
* Sort imports by name
* Add an empty line: 2 empty lines between code blocks at the module level (PEP 8)
-import unittest
-from test import support
-
-import collections, random, string
+import collections
import collections.abc
-import gc, weakref
+import gc
import pickle
+import random
+import string
+import unittest
+import weakref
+from test import support
class DictTest(unittest.TestCase):
class SubclassMappingTests(mapping_tests.BasicTestMappingProtocol):
type2test = Dict
+
if __name__ == "__main__":
unittest.main()