1 files changed, 36 insertions, 0 deletions
diff --git a/lib/python2.7/site-packages/django/utils/itercompat.py b/lib/python2.7/site-packages/django/utils/itercompat.py
new file mode 100644
index 0000000..c50dcfb
--- /dev/null
+++ b/lib/python2.7/site-packages/django/utils/itercompat.py
@@ -0,0 +1,36 @@
+"""
+Providing iterator functions that are not in all version of Python we support.
+Where possible, we try to use the system-native version and only fall back to
+these implementations if necessary.
+"""
+
+import collections
+import itertools
+import sys
+import warnings
+
+
+def is_iterable(x):
+    "A implementation independent way of checking for iterables"
+    try:
+        iter(x)
+    except TypeError:
+        return False
+    else:
+        return True
+
+def is_iterator(x):
+    """An implementation independent way of checking for iterators
+
+    Python 2.6 has a different implementation of collections.Iterator which
+    accepts anything with a `next` method. 2.7+ requires and `__iter__` method
+    as well.
+    """
+    if sys.version_info >= (2, 7):
+        return isinstance(x, collections.Iterator)
+    return isinstance(x, collections.Iterator) and hasattr(x, '__iter__')
+
+def product(*args, **kwds):
+    warnings.warn("django.utils.itercompat.product is deprecated; use the native version instead",
+                  DeprecationWarning, stacklevel=2)
+    return itertools.product(*args, **kwds)