numpy.emath)¶Note
numpy.emath is a preferred alias fornumpy.lib.scimath,available afternumpy is imported.
Wrapper functions to more user-friendly calling of certain math functionswhose output data-type is different than the input data-type in certaindomains of the input.
For example, for functions likelog with branch cuts, the versions in thismodule provide the mathematically valid answers in the complex plane:
>>>importmath>>>fromnumpy.libimportscimath>>>scimath.log(-math.exp(1))==(1+1j*math.pi)True
Similarly,sqrt, other base logarithms,power and trig functions arecorrectly handled. See their respective docstrings for specific examples.