Stand-alone Python code for exp(x) – 1

See the corresponding page for C++ for an explanation of the problem and the solution.

The Python code is trivial:

import math

def expm1(x):
    if abs(x) < 1e-5:
        return x + 0.5*x*x
    else:
        return math.exp(x) - 1.0

More stand-alone numerical code

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