Reusable functions

convert_temperature.py

# Reusable temperature conversion function

def convert_temperature(to_scale, temperature):
    if to_scale == "f" or to_scale == "F":
        # Convert to Fahrenheit
        return temperature * 9.0 / 5 + 32
    elif to_scale == "c" or to_scale == "C":
        # Convert to Celsius
        return (temperature - 32) * 5.0 / 9.0
    else:
        print "Invalid to_scale argument."


# Examples

print convert_temperature("f", 0.0)
# prints 32.0

print convert_temperature("c", 212.0)
# prints 100.0