SPECIFYING DEFAULT VALUES IN A FUNCTION

Listing 2.13 shows the content of DefaultValues.py, which illustrates how to specify default values in a function.

Listing 2.13: DefaultValues.py

def numberFunc(a, b=10):

 print (a,b)

def stringFunc(a, b='xyz'):

 print (a,b)

def collectionFunc(a, b=None):

 if(b is None):

  print('No value assigned to b')

numberFunc(3)

stringFunc('one')

collectionFunc([1,2,3])

Listing 2.13 defines three functions, followed by an invocation of each of those functions. The functions numberFunc() and stringFunc() print a list contain the values of their two parameters, and collectionFunc() displays a message if the second parameter is None. The output from Listing 2.13 is here:

(3, 10)

('one', 'xyz')

No value assigned to b

Returning Multiple Values From a Function

This task is accomplished by the code in Listing 2.14, which shows the content of MultipleValues.py.

Listing 2.14...