Import Modules

Modules (packages, libraries) are collections of functions that needs to be assinged (imported) with import before using it in Python.

1) function call requires module prefix

import math

x = math.log(5)

2) import all module functions to use without modul prefix

from math import *

x = log(5)

3) import only selected functions

from math import log, sqrt, sin

x = log(5)

4) change name of imported function

from math import log as ln

x = ln(5)

5) change name of imported module

import math as m

x = m.log(5)

Note, external modules needs to be locally installed on the computer before importing in Python.

Install Modules