Question

I am new to Python programming, so please bear with my nascent question.

If we want to use certain function inside numpy, say func, do we need to just import numpy once and then call the function as following:

import numpy
np.func

Or, do we further need to import specific sub modules of numpy before calling any function? Thanks.

Answer 1

If you want to use linalg you have to do:

numpy.linalg

For example, if you want to calculate determinant of x, you would do

import numpy

x = numpy.array([[1,2],[5,7]])
det_x = numpy.linalg.det(x)

#or

import numpy as np

x = np.array([[1,2],[5,7]])
det_x = np.linalg.det(x)