Question

The colours red, blue, and yellow are known as the primary colours because they cannot be made by mixing other colours.

When you mix two primary colours, you get one of following secondary colour:

-Mix red and blue: purple

-Mix red and yellow: orange

-Mix blue and yellow: green

Write a function colour_mix that takes two strings as parameters as two primary colours and returns the secondary colour.

If the parameters are anything other than "red", "blue", or "yellow", the function

should return the string "Error". Save the function in a PyDev library module named functions.py.

Write a main program named t05.py that tests the function by asking the user to enter the names of two primary colours to mix and displays the mixed

colour.

A sample run:

Enter a first colour: red

Enter a second

colour: blue

The mixed colour is purple.

Or

Enter a first colour: red

Enter a second colour: brown

The mixed colour is Error

.

Answer 1

code:

functions.py:

#defining the function colour mix
def colour_mix(col1,col2):
   #if color is red and blue
   if ((col1=="red" and col2=="blue") or(col1=="blue" and col2=="red")):
       res="purple"
   #if color is red and yellow
   elif ((col1=="red" and col2=="yellow") or(col1=="yellow" and col2=="red")):
       res="orange"
   #if color is blue and yellow
   elif ((col1=="blue" and col2=="yellow") or(col1=="yellow" and col2=="blue")):
       res="green"
   #if invalid input
   else:
       res="error"
   #returning res
   return res   

t05.py

#importing the module
import functions
#taking inputs from user
color1=input("Enter Color 1: ")
color2=input("Enter color 2 :" )
#storing the return value in result from calling the function
result=functions.colour_mix(color1,color2)
#printing result
print(result)

Output:

Code Screenshot:

Code Snippet:

functions.py

#defining the function colour mix
def colour_mix(col1,col2):
        #if color is red and blue
        if ((col1=="red" and col2=="blue") or(col1=="blue" and col2=="red")):
                res="purple"
        #if color is red and yellow
        elif ((col1=="red" and col2=="yellow") or(col1=="yellow" and col2=="red")):
                res="orange"
        #if color is blue and yellow
        elif ((col1=="blue" and col2=="yellow") or(col1=="yellow" and col2=="blue")):
                res="green"
        #if invalid input
        else:
                res="error"
        #returning res
        return res      

t05.py

#importing the module
import functions
#taking inputs from user
color1=input("Enter Color 1: ")
color2=input("Enter color 2 :" )
#storing the return value in result from calling the function
result=functions.colour_mix(color1,color2)
#printing result
print(result)