Charming the Python: Modules

If coding tutorials with math examples are the bane of your existence, keep reading. This series uses relatable examples like dogs and cats.

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Modules

Modules are chunks of code, saved in a file, that are made to help you do things easier. A module could be a file containing a single variable, or function, a massive codebase.

A module is a python script, saved as filename.py

Creating

Here's an example of something you may want to use later.

# fullname.py
def generate_full_name(firstname, lastname):
      space = ' '
      fullname = firstname + space + lastname
      return fullname

Importing a Module

In order to use a module that you've created, you'll need to import it in a different file. Once imported, it can be used anywhere in your new file.

The syntax for using an imported module is modulename.funtion_name(parameters)

import fullname

print(fullname.generate_full_name('Vicki', 'Langer'))

Importing Functions from a Module

You can use multiple functions from a module, by importing each one.

To do this, you'll follow the below syntax. Each script may have many functions. If you don't want to import allllllll of them, this is a great option.

from modulename import feed_pet, generate_full_name

Built-In Modules

There are modules that are already included with Python. Here are some common ones.

math

import math
print(math.pi)

>>> 3.141592653589793

random

random gives pseudo-random outputs

from random import random, randint
print(random())   # returns something bewtween 0 and 0.9999
print(randint(3, 72)) # returns a number between two arguments

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Series based on

30 Days Of Python Challenge

Asabeneh ・ Nov 20 '19 ・ 1 min read

#python #javascript #react #mongodb