add some Python 2 modules

python2/_functools.py

@@ -0,0 +1,11 @@
+# This is an autogenerated file. It serves as a starting point
+# for a more percise manual annotation of this module.
+# Feel free to edit the source below, but remove this header when you do.
+
+def reduce(*args, **kwargs) -> object:
+    raise TypeError()
+
+
+class partial(object):
+    def __reduce__() -> tuple: pass
+    def __setstate__(a, b, c, d) -> NoneType: pass