import types

bim = types.BuiltinMethodType
bim2 = types.BuiltinFunctionType
assert bim == bim2, "BuiltinFunctionType is not the same as BuiltinMethodType"

a = type([].append)
b = type(dir)
assert a== bim, "not a BuiltinMethodType"
assert a == type(dir), "Not same types"
assert b == bim, "Not same types"
assert b == bim2, "Not same types"
try:
   import inspect
   assert inspect.isbuiltin([].append), "not builtin"
   assert inspect.isbuiltin(dir), "not builtin"
except:
    print "BOom!, inspect problem"