Comment #3 on issue 1291 by fabian.seoane: reduce the import sympy time
http://code.google.com/p/sympy/issues/detail?id=1291
Now I see that this comes from the line
_assume_rules = FactRules([
'integer -> rational',
.... (lots of things)
])
in core.assumptions.AssumeMeths
And as I can see, FactRules is a very expensive method. As the docstring of
__init__
says, "Compile rules into internal lookup tables". Could this class be
lazy ? (it
does not compile the rules until you really need them ?
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