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pythonsympyfractions

Sympy returns zero for fractions with real numbers

I'm new to Sympy, and have realized it is quite nice for calculating and simplifying algebraic expressions.

However, when when I write fractions of real numbers it returns zero (no problem with fractions of symbols like 'x'). What am I doing wrong?

from sympy import *

1./2
Out[2]: 0.5

1/2
Out[3]: 0
Solution

  • it's because python (2.7) needs a float in denominator or numerator to return a float.

    in python 3.x any division returns a float

    You can also 'fix' in python 2.7 that by using :

    from __future__ import division

    In fact python follow the integer division rules and return an integer and not a float number