Testing Automatically using Doctest

Follow the procedure below:

1) Create function in IDE (e.g. convert_to_celsius)

def convert_to_celsius(fahrenheit):
    '''(number) -> float

    Return the number of Celsius degrees equivalent to fahrenheit degrees

    >>> convert_to_celsius(32)
    0.0
    >>> convert_to_celsius(212)
    100.0
    '''
    return (fahrenheit - 32) * 5 / 9

def colder_temperature(temp1, temp2):
    '''(number, number) -> number
    Return the colder of the two temperatures, temp1 (degrees Celsius)
    and temp2 (degrees Fahrenheit), in degrees Celsius.
    '''
    return

2) Save the module and run it in IDE (press F5)
3) Go to Python Shell
4) Do following:

>>> import doctest
>>> doctest.testmod()
TestResults(failed=0, attempted=2)
>>>
>>>#--> If falied=0, then the function is correct