MAINT: Use built-in zip_longest and izip_longest

Author: doctaphred

interface/compat.py

@@ -1,13 +1,13 @@
 import functools
 import sys
-from itertools import repeat
 
 version_info = sys.version_info
 
 PY2 = version_info.major == 2
 PY3 = version_info.major == 3
 
 if PY2:  # pragma: nocover-py3
+    from itertools import izip_longest as zip_longest
     from funcsigs import signature, Parameter
 
     @functools.wraps(functools.wraps)
@@ -48,6 +48,7 @@ def _is_wrapper(f):
 
 else:  # pragma: nocover-py2
     from inspect import signature, Parameter, unwrap
+    from itertools import zip_longest
 
     wraps = functools.wraps
 
@@ -58,33 +59,6 @@ def viewkeys(d):
         return d.keys()
 
 
-def zip_longest(left, right):
-    """Simple zip_longest that only supports two iterators and None default.
-    """
-    left = iter(left)
-    right = iter(right)
-    left_done = False
-    right_done = False
-    while True:
-        try:
-            left_yielded = next(left)
-        except StopIteration:
-            left_done = True
-            left_yielded = None
-            left = repeat(None)
-        try:
-            right_yielded = next(right)
-        except StopIteration:
-            right_done = True
-            right_yielded = None
-            right = repeat(None)
-
-        if left_done and right_done:
-            break
-
-        yield left_yielded, right_yielded
-
-
 # Taken from six version 1.10.0.
 def with_metaclass(meta, *bases):
     """Create a base class with a metaclass."""