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Edit and run



In [1]:

    
from __future__ import print_function



In [2]:

    
def goo(a='hello', b='world'):
    print(a, b)



In [3]:

    
goo()









    



hello world



In [4]:

    
goo('jello')









    



jello world



In [5]:

    
goo('jello', 'whirled')









    



jello whirled