Updates:
Status: Started
Comment #10 on issue 2026 by ronan.l...@gmail.com: Exact, algebraic, and
integer_power substitution
http://code.google.com/p/sympy/issues/detail?id=2026
In https://github.com/rlamy/sympy/commits/matching, I implemented atomic
substitution as .replace(). Syntactic sugar aside, it takes a dictionary
like {old1: new1, ...} and basically does the following:
def replace(self, repl_dict):
if self in repl_dict:
return repl_dict[self]
else:
return self.func(*[arg.replace(repl_dict) for arg in self.args])
The difference with .subs() is that it doesn't consider the meaning of the
args at all and that it does the replacements in a single pass.
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