asyncio: Add asyncio.compat module
Move compatibility helpers for the different Python versions to a new
asyncio.compat module.
diff --git a/Lib/asyncio/compat.py b/Lib/asyncio/compat.py
new file mode 100644
index 0000000..660b7e7
--- /dev/null
+++ b/Lib/asyncio/compat.py
@@ -0,0 +1,17 @@
+"""Compatibility helpers for the different Python versions."""
+
+import sys
+
+PY34 = sys.version_info >= (3, 4)
+PY35 = sys.version_info >= (3, 5)
+
+
+def flatten_list_bytes(list_of_data):
+ """Concatenate a sequence of bytes-like objects."""
+ if not PY34:
+ # On Python 3.3 and older, bytes.join() doesn't handle
+ # memoryview.
+ list_of_data = (
+ bytes(data) if isinstance(data, memoryview) else data
+ for data in list_of_data)
+ return b''.join(list_of_data)