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Python | How to create Modules (Example of Modules)?

Python Modules with Examples: Here, we are going to learn how to create modules in Python? Here, we have some of the examples on Python Modules.
Submitted by Pankaj Singh, on October 20, 2018

This is an example of creating module in python. Module files are special file that are used as library files and can be accessed in another file.

In this example, there are two module files "mycheck.py" and "mymath.py" – the modules contains the functions related to the checking the numbers and mathematical operations

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pycheck.py

def iseven(n):
    ans=False
    if n%2==0:
        ans=True
    return ans

def isodd(n):
    ans=False
    if n%2==1:
        ans=True
    return ans

def isprime(n):
    ans=False
    c=0
    for i in range(1,n+1):
        if n%i==0:
            c=c+1
    if c==2:
        ans=True
    return ans

def ispalindrome(n):
    ans=False
    m=n
    rev=0
    while n>0:
        dig=n%10
        rev = rev*10+dig
        n=n//10
    if rev==m:
        ans=True
    return ans

mymath.py

def sum(a,b):
    c=a+b
    return c

def difference(a,b):
    c=a-b
    return c

def product(a,b):
    c=a*b
    return c

def quotient(a,b):
    c=a/b
    return c

def remainder(a,b):
    c=a%b
    return c

Now, we are implementing the operations from the module functions in the below examples:

Example 1) menu.py

In this program all the functions of both modules i.e. mycheck.py/mymath.py are get loaded in menu.py’s memory and have to use module name as parent to access child functions.

import os
import mymath
import mycheck

def main():
    ans=True
    while ans:
        os.system('cls')
        print("MENU")
        print("--------------------------------------")
        print("1.Add")
        print("2.Substract")
        print("3.Multiply")
        print("4.Divide")
        print("5.Even Check")
        print("6.Odd Check")
        print("7.Prime Check")
        print("8.Palindrome Check")
        print("9.Exit")
        print("-------------------------------------")
        ch=int(input("Enter choice(1-9):"))
        print("-------------------------------------")
        if ch==1:
            a = int(input("Enter A: "))
            b = int(input("Enter B: "))
            c = mymath.sum(a,b)
            print("Sum    :",c)
        elif ch==2:
            a = int(input("Enter A: "))
            b = int(input("Enter B: "))
            c = mymath.difference(a,b)
            print("difference    :",c)
        elif ch==3:
            a = int(input("Enter A: "))
            b = int(input("Enter B: "))
            c = mymath.product(a,b)
            print("Product    :",c)
        elif ch==4:
            a = int(input("Enter A: "))
            b = int(input("Enter B: "))
            c = mymath.quotient(a,b)
            print("Quotient    :",c)
        elif ch==5:
            n = int(input("Enter N: "))
            if mycheck.iseven(n)==True:
                print(n,"is Even")
            else:
                print(n,"is Not Even")
        elif ch==6:
            n = int(input("Enter N: "))
            if mycheck.isodd(n)==True:
                print(n,"is Odd")
            else:
                print(n,"is Not Odd")
        elif ch==7:
            n = int(input("Enter N: "))
            if mycheck.isprime(n)==True:
                print(n,"is Prime")
            else:
                print(n,"is Not Prime")
        elif ch==8:
            n = int(input("Enter N: "))
            if mycheck.ispalindrome(n)==True:
                print(n,"is Palindrome")
            else:
                print(n,"is Not Palindrome")
        elif ch==9:
            ans=False
        print("-------------------------------------")
        input("Press any key.....")
if __name__=="__main__":main()

Example 2) menu2.py

In this program all the functions of both modules i.e. mycheck.py/mymath.py are get loaded in menu2.py’s memory and child functions can be called directly

from os import *
from mymath import *
from mycheck import *

def main():
    ans=True
    while ans:
        system('cls')
        print("MENU")
        print("--------------------------------------")
        print("1.Add")
        print("2.Substract")
        print("3.Multiply")
        print("4.Divide")
        print("5.Even Check")
        print("6.Odd Check")
        print("7.Prime Check")
        print("8.Palindrome Check")
        print("9.Exit")
        print("-------------------------------------")
        ch=int(input("Enter choice(1-9):"))
        print("-------------------------------------")
        if ch==1:
            a = int(input("Enter A: "))
            b = int(input("Enter B: "))
            c = sum(a,b)
            print("Sum    :",c)
        elif ch==2:
            a = int(input("Enter A: "))
            b = int(input("Enter B: "))
            c = difference(a,b)
            print("difference    :",c)
        elif ch==3:
            a = int(input("Enter A: "))
            b = int(input("Enter B: "))
            c = product(a,b)
            print("Product    :",c)
        elif ch==4:
            a = int(input("Enter A: "))
            b = int(input("Enter B: "))
            c = quotient(a,b)
            print("Quotient    :",c)
        elif ch==5:
            n = int(input("Enter N: "))
            if iseven(n)==True:
                print(n,"is Even")
            else:
                print(n,"is Not Even")
        elif ch==6:
            n = int(input("Enter N: "))
            if isodd(n)==True:
                print(n,"is Odd")
            else:
                print(n,"is Not Odd")
        elif ch==7:
            n = int(input("Enter N: "))
            if isprime(n)==True:
                print(n,"is Prime")
            else:
                print(n,"is Not Prime")
        elif ch==8:
            n = int(input("Enter N: "))
            if ispalindrome(n)==True:
                print(n,"is Palindrome")
            else:
                print(n,"is Not Palindrome")
        elif ch==9:
            ans=False
        print("-------------------------------------")
        input("Press any key.....")
if __name__=="__main__":main()

Example 3) menu3.py

In this program only few functions of both modules i.e. mycheck.py/mymath.py are get Loaded in menu3.py's memory and child functions can be called directly

from os import system
from mymath import sum,difference
from mycheck import iseven,isprime,ispalindrome

def main():
    ans=True
    while ans:
        system('cls')
        print("MENU")
        print("--------------------------------------")
        print("1.Add")
        print("2.Substract")
        print("3.Even Check")
        print("4.Prime Check")
        print("5.Palindrome Check")
        print("6.Exit")
        print("-------------------------------------")
        ch=int(input("Enter choice(1-6):"))
        print("-------------------------------------")
        if ch==1:
            a = int(input("Enter A: "))
            b = int(input("Enter B: "))
            c = sum(a,b)
            print("Sum    :",c)
        elif ch==2:
            a = int(input("Enter A: "))
            b = int(input("Enter B: "))
            c = difference(a,b)
            print("difference    :",c)
        elif ch==3:
            n = int(input("Enter N: "))
            if iseven(n)==True:
                print(n,"is Even")
            else:
                print(n,"is Not Even")
        elif ch==4:
            n = int(input("Enter N: "))
            if isprime(n)==True:
                print(n,"is Prime")
            else:
                print(n,"is Not Prime")
        elif ch==5:
            n = int(input("Enter N: "))
            if ispalindrome(n)==True:
                print(n,"is Palindrome")
            else:
                print(n,"is Not Palindrome")
        elif ch==6:
            ans=False
        print("-------------------------------------")
        input("Press any key.....")
if __name__=="__main__":main()

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