Is there a nice way to get Tuple to inherit tuple's methods? e.g. the
count fails:

>>> a=Tuple(1,2,3,2)
>>> a.count(S(2))
0
>>> a.count(2)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "sympy\core\basic.py", line 992, in count
    return sum(self.find(query, group=True).values())
  File "sympy\core\basic.py", line 975, in find
    rec_find(self)
  File "sympy\core\basic.py", line 969, in rec_find
    if _query(expr):
TypeError: 'int' object is not callable

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