Fix use of getheaders on Python 3

1 files changed, 15 insertions, 0 deletions

diff --git a/setuptools/py27compat.py b/setuptools/py27compat.py
new file mode 100644
index 00000000..9d2886db
--- /dev/null
+++ b/setuptools/py27compat.py
@@ -0,0 +1,15 @@
+"""
+Compatibility Support for Python 2.7 and earlier
+"""
+
+import sys
+
+def get_all_headers(message, key):
+	"""
+	Given an HTTPMessage, return all headers matching a given key.
+	"""
+	return message.get_all(key)
+
+if sys.version_info < (3,):
+	def get_all_headers(message, key):
+		return message.getheaders(key)