While checking SymPy wiki's tutorial about pattern
matching<http://wiki.sympy.org/wiki/Tutorial#Pattern_matching>,
I ended up with the following:
>>> from sympy import *
>>> x = Symbol('x')
>>> p = Wild('p')
>>> q = Wild('q')
>>> (5*x**2 + 3*x).match(p*x**2 + q*x)
I got the following result,
{q_: 5*x, p_: 3/x}
while result presented in wiki is
{p_: 5, q_: 3}
I can get the second result by defining
>>> p = Wild('p', exclude='x')
>>> q = Wild('q', exclude='x')
but shouldn't SymPy return that "natural" result by default? (Nevertheless,
I don't know how to define which answer would be the "natural" one in a
general case.)
Roberto.
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