4.15: Python Examples

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Temperature

# This program asks the user to select Fahrenheit or Celsius conversion
# and input a given temperature. Then the program converts the given 
# temperature and displays the result.
#
# References:
#     https://www.mathsisfun.com/temperature-conversion.html
#     https://en.wikibooks.org/wiki/Python_Programming


def get_choice():
    print("Enter C to convert to Celsius or F to convert to Fahrenheit:")
    choice = input()    
    return choice


def process_celsius():
    temperature = get_temperature("Fahrenheit")
    result = calculate_celsius(temperature)
    display_result (temperature, "Fahrenheit", result, "Celsius")


def process_fahrenheit():
    temperature = get_temperature("Celsius")
    result = calculate_fahrenheit(temperature)
    display_result (temperature, "Celsius", result, "Fahrenheit")


def get_temperature(scale):
    print("Enter " + scale + " temperature:")
    temperature = float(input())    
    return temperature


def calculate_celsius(fahrenheit):
    celsius = (fahrenheit - 32) * 5 / 9    
    return celsius


def calculate_fahrenheit(celsius):
    fahrenheit = celsius * 9 / 5 + 32
    return fahrenheit


def display_result(temperature, fromScale, result, toScale):
    print(str(temperature) + str("° ") + fromScale + " is " + str(result) + "° " + toScale)


def main():
    choice = get_choice()
    if choice == "C" or choice == "c":
        process_celsius ()
    elif choice == "F" or choice == "f":
        process_fahrenheit ()
    else:
        print("You must enter C to convert to Celsius or F to convert to Fahrenheit.")


main()

Output

Enter C to convert to Celsius or F to convert to Fahrenheit:
 c
Enter Fahrenheit temperature:
 100
100.0° Fahrenheit is 37.77777777777778° Celsius

Enter C to convert to Celsius or F to convert to Fahrenheit:
 f
Enter Celsius temperature:
 100
100.0° Celsius is 212.0° Fahrenheit

Enter C to convert to Celsius or F to convert to Fahrenheit:
 x
You must enter C to convert to Celsius or F to convert to Fahrenheit.

References

Wikiversity: Computer Programming