Implement tree-shaking for Python sources

third_party/python/Lib/test/pickletester.py

@@ -1,6 +1,6 @@
 import collections
 import copyreg
-import dbm
+# import dbm
 import io
 import functools
 import pickle
@@ -979,7 +979,7 @@ class AbstractUnpickleTests(unittest.TestCase):
         self.assertIs(self.loads(pickled), functools.reduce)
         # whichdb.whichdb
         pickled = b'\x80\x02cwhichdb\nwhichdb\n.'
-        self.assertIs(self.loads(pickled), dbm.whichdb)
+        # self.assertIs(self.loads(pickled), dbm.whichdb)
         # Exception(), StandardError()
         for name in (b'Exception', b'StandardError'):
             pickled = (b'\x80\x02cexceptions\n' + name + b'\nU\x03ugh\x85R.')
@@ -2257,7 +2257,7 @@ class AbstractPickleTests(unittest.TestCase):
             (range(1, 7), '__builtin__', 'xrange'),
             (map(int, '123'), 'itertools', 'imap'),
             (functools.reduce, '__builtin__', 'reduce'),
-            (dbm.whichdb, 'whichdb', 'whichdb'),
+            # (dbm.whichdb, 'whichdb', 'whichdb'),
             (Exception(), 'exceptions', 'Exception'),
             (collections.UserDict(), 'UserDict', 'IterableUserDict'),
             (collections.UserList(), 'UserList', 'UserList'),

third_party/python/Lib/test/test_poplib.py

@@ -19,7 +19,10 @@ PORT = 0
 
 SUPPORTS_SSL = False
 if hasattr(poplib, 'POP3_SSL'):
-    import ssl
+    try:
+        import ssl
+    except ImportError:
+        assert False
 
     SUPPORTS_SSL = True
     CERTFILE = os.path.join(os.path.dirname(__file__) or os.curdir, "keycert3.pem")

third_party/python/Lib/test/test_subprocess.py

@@ -23,8 +23,8 @@ try:
     import ctypes
 except ImportError:
     ctypes = None
-else:
-    import ctypes.util
+# else:
+#     import ctypes.util
 
 try:
     import _thread