pythonnumpynatural-logarithm

'e' the base of natural logarithm in python

name 'e' is not defined I ma getting this error in my python code. I have already imported the math and the numpy modules. What more do I need?

Solution

  • Use

    import math

math.e

    Similar, for example:

    import math

math.pi

    This way, it is clear which e (or pi) or meant, instead of a random letter e somewhere in your code.

    If you are using NumPy instead, you could do as follows:

    import numpy as np

np.e

    (the NumPy import is generally abbreviated to np).

    Both e's are the same.