future.builtins

The future.builtins module is also accessible as builtins on Py2.

• pow() supports fractional exponents of negative numbers like in Py3:

  >>> from builtins import pow
  >>> pow(-1, 0.5)
  (6.123233995736766e-17+1j)
  

• round() uses Banker’s Rounding as in Py3 to the nearest even last digit:

  >>> from builtins import round
  >>> assert round(0.1250, 2) == 0.12