example_float.rst

Dealing With Floating Numbers

There will be some errors in floating numbers computations. So identical objects may be deemed different. To tackle with this problem, this library believe two objects equal if their difference is smaller that a small number eps. Another value is named significant number has the relationship with eps:

significant number = -log(eps)

The default value of eps is 1e-10. You can access and change the value as follows:

>>> get_eps()
1e-10
>>> get_sig_figures()
10
>>> set_sig_figures(5)
>>> get_eps()
1e-05
>>> get_sig_figures()
5
>>> set_eps(1e-12)
>>> get_eps()
1e-12
>>> get_sig_figures()
12