array stored as the list will require more space as compared to arrays they are speedier to work with and hence are more efficient than the lists they are more convenient to deal with we will learn about these points in more details in later part of this unit importing numpy before going details on numpy let' try to understand how to write simple python program using numpy firstlyyou need to import the numpy library importing numpy can be done by running the following commandimport numpy as np it is general approach to import numpy with alias as 'npif an alias is not provided then to access the functions from numpy we shall write numpy function to make it easier an alias 'npis introduced so we can write np function so just write the above statement in python file and run it if it shows any error message then we need to install numpy in our system examplenumpyexample py import numpy as np outputimport numpy as np modulenotfounderrorno module named 'numpyif we get such type of message then our numpy is not installed in the system the first step is to install the numpy package into the system how to install numpy in pycharm step- open the pycharm ide as follows page