I'm pretty sure you are aware of this, but count is actually a method of
Expr. Not sure how to use it, though:
In [3]: sin(2*x).count(S(2))
Out[3]: 0
In [6]: sin(2*x).count(x)
Out[6]: 0
...
On 01.09.2011 06:07, smichr wrote:
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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