Python: How to use functions inside numpy?

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

Almost, if you want to use numpy as np you have to import it like this:

import numpy as np

Other than that you can use the functions like that.

Answer 2

As with every other fricking module in existence , you use the name you import it as.

import numpy
numpy.func

...

import numpy as np
np.func

Answer 3

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)