Tests: more Python tests.

test/python/input_read_length/wsgi.py

@@ -0,0 +1,7 @@
+def application(environ, start_response):
+
+    input_length = int(environ.get('HTTP_INPUT_LENGTH'))
+    body = bytes(environ['wsgi.input'].read(input_length))
+
+    start_response('200', [('Content-Length', str(len(body)))])
+    return [body]