Am 21.06.2014 11:19, schrieb Saurabh Jha:
I think we can make regular expressions that will match Integers, floating
points etc. Something along the lines of this
for int -> re.compile('^\d+$')
for float -> re.compile('^\d+\.\d+$')
What do you think about it?
First, it' unnecessarily slow.
Just check whether f == round(f) for floats.
Second, the question whether a float is integral or not borders on
madness - you never know whether the answer "it's a natural number"
comes from the round-off lottery or is genuine.
Third, regular expressions aren't going to give any meaningful results
for symbolic expressions, and the "Sym" in SymPy defines its mission
statement: symbolic math.
If you pursue a way to find out whether a *symbolic expression* is in
ZZ, QQ, Complex, or whatever, then that would be worth thinking about.
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