Here's one simple one:
print ("Press 1 - for Addition")
print ("Press 2 - for Subtraction")
print ("Press 3 - for Multiplication")
print ("Press 4 - for Division")
num1 = input ("Enter a Choice: ")
if num1 == '1' :
numb1 = input ("Enter a number to add: ")
numb2 = input ("Enter another number to add: ")
sum = float(numb1)+float(numb2)
print ('The sum of {0} and {1} is {2}'. format(numb1, numb2, sum))
elif num1 == '2' :
numb1 = input ("Enter a number to subtract: ")
numb2 = input ("Enter another number to subtract: ")
difference = float(numb1)-float(numb2)
print ('The difference of {0} and {1} is {2}'. format(numb1, numb2, difference))
elif num1 == '3' :
numb1 = input ("Enter a number to multiply: ")
numb2 = input ("Enter another number to multiply: ")
mul = float(numb1)*float(numb2)
print ('The product of {0} and {1} is {2}'. format(numb1, numb2,mul))
elif num1 == '4' :
numb1 = input ("Enter a number to divide: ")
numb2 = input ("Enter another number to divide: ")
div = float(numb1)/float(numb2)
print ('The quotient of {0} and {1} is {2}'. format(numb1, numb2, div))
print ("Thank you for using my first calculator : )")