how to declare an array in numpy code example

Example 1: how to make a numpy array

>>> x = np.array([2,3,1,0])
>>> x = np.array([2, 3, 1, 0])
>>> x = np.array([[1,2.0],[0,0],(1+1j,3.)]) # note mix of tuple and lists,
    and types
>>> x = np.array([[ 1.+0.j, 2.+0.j], [ 0.+0.j, 0.+0.j], [ 1.+1.j, 3.+0.j]])

Example 2: how to make an array python

#arrays and lists are different
#numpy arrays are faster
this_is_a_list = [1, 2, 3]
import numpy #is you do not have it do pip install numpy
this_is_an_array = numpy.array([1, 2, 3])