Python functions that you can add to your code for basic calculations.

basics.py

#Function to find if the number is Even or Odd
def evenodd(a):
    if(a%2==0):
        return(a,"is Even")
    else:
        return(a,"is Odd")

#Fuction to find if the number is Prime or Not
def prime(a):
    x=True
    count=2
    while(count<=a/2):
        if(a%count==0):
            x=False
            break
        count+=1
    if(x==True):
        return(a,"is Prime number.")
    else:
        return(a,"is not a Prime number.")

#Function to add given numbers
def add(*numbers):
    x=0
    for i in numbers:
        x=x+i
    return(x)

#Function to multiply given numbers
def mul(*numbers):
    x=1
    for i in numbers:
        x=x*i
    return(x)

#Function to subtract 2 given numbers
def sub(a,b):
    x=a-b
    return(x)

#Function to divide 2 given numbers
def div(a,b):
    x=a/b
    return(x)

#Function to find avg of given numbers
def avg(*numbers):
    x=0
    for i in numbers:
        x=x+i
    return(x/len(numbers))

#Function to find factorial of a give number
def factorial(a):
    if(a==0 or a==1):
        return 1
    else:
        return a*factorial(a-1)