How do I get a whole number as a result for a cube root?

Question

I am creating a problem which requires me to find the cube root of certain numbers, some of them have whole number roots, but a lot of them don\'t.

I have numbers li

Answer 1

Avoid any hacks with floats and tolerance levels, these are often unreliable for large inputs. A better tool for the job is to use a multiple precision arithmetic library such as gmpy2:

>>> import gmpy2
>>> root, exact = gmpy2.iroot(125, 3)
>>> print(root)
5
>>> print(exact)
True