Fix dir(torch) for python 3.7 (pytorch#10271)

Summary:
fixes pytorch#10160.
Pull Request resolved: pytorch#10271

Differential Revision: D9188031

Pulled By: li-roy

fbshipit-source-id: a3620553a8ba2b7391acdf78dbe58afcdb6c5f7f

Author: Roy Li

test/test_torch.py

@@ -143,6 +143,9 @@ def make_contiguous_slice(size, dtype):
 
         return tensors
 
+    def test_dir(self):
+        dir(torch)
+
     def test_dot(self):
         types = {
             'torch.DoubleTensor': 1e-8,

torch/__init__.py

@@ -251,6 +251,8 @@ def manager_path():
 del manager_path
 
 for name in dir(_C._VariableFunctions):
+    if name in ["__dir__", "__doc__"]:
+        continue
     globals()[name] = getattr(_C._VariableFunctions, name)
 
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