How do I use method overloading in Python

0 votes

I am trying to implement method overloading in Python:

class A:
    def stackoverflow(self):    
        print 'first method'
    def stackoverflow(self, i):
        print 'second method', i

ob=A()
ob.stackoverflow(2)

but the output is second method 2; similarly:

class A:
    def stackoverflow(self):    
        print 'first method'
    def stackoverflow(self, i):
        print 'second method', i

ob=A()
ob.stackoverflow()

gives

Traceback (most recent call last):
  File "my.py", line 9, in <module>
    ob.stackoverflow()
TypeError: stackoverflow() takes exactly 2 arguments (1 given)

How do I make this work?

Jan 3, 2023 in Python by erzan
• 630 points
480 views

1 answer to this question.

0 votes

It's method overloading, not method overriding. And in Python, you historically do it all in one function:

class A:
    def stackoverflow(self, i='some_default_value'):
        print('only method')

ob=A()
ob.stackoverflow(2)
ob.stackoverflow()

See the Default Argument Values section of the Python tutorial. See "Least Astonishment" and the Mutable Default Argument for a common mistake to avoid.

See PEP 443 for information about the single dispatch generic functions added in Python 3.4:

>>> from functools import singledispatch
>>> @singledispatch
... def fun(arg, verbose=False):
...     if verbose:
...         print("Let me just say,", end=" ")
...     print(arg)
>>> @fun.register(int)
... def _(arg, verbose=False):
...     if verbose:
...         print("Strength in numbers, eh?", end=" ")
...     print(arg)
...
>>> @fun.register(list)
... def _(arg, verbose=False):
...     if verbose:
...         print("Enumerate this:")
...     for i, elem in enumerate(arg):
...         print(i, elem)

Master the art of Data Science with Python and unlock the power of insights.

answered Jan 4, 2023 by Elton
• 400 points

Related Questions In Python

0 votes
0 answers

How do I use method overloading in Python?

I am trying to implement method overloading ...READ MORE

Apr 26, 2022 in Python by Edureka
• 13,620 points
469 views
0 votes
1 answer

How do I use urllib to see if a website is 404 or 200 in Python?

For Python 3, try doing this: import urllib.request, ...READ MORE

answered Nov 29, 2018 in Python by Nymeria
• 3,560 points

edited Dec 11, 2018 by Nymeria 13,968 views
0 votes
0 answers

how do i use the XOR operator in python regular expression?

can u give an example? READ MORE

Mar 26, 2019 in Python by Waseem
• 4,540 points
1,734 views
0 votes
1 answer

How do I use lambda() with reduce() in python?

The reduce() function in Python takes in ...READ MORE

answered May 20, 2019 in Python by Umer
1,930 views
0 votes
2 answers
+1 vote
2 answers

how can i count the items in a list?

Syntax :            list. count(value) Code: colors = ['red', 'green', ...READ MORE

answered Jul 7, 2019 in Python by Neha
• 330 points

edited Jul 8, 2019 by Kalgi 4,391 views
0 votes
1 answer
0 votes
1 answer

What is the data type of (1) in python?

Typecasting is the process of converting one ...READ MORE

answered Jan 4, 2023 in Python by Elton
• 400 points
664 views
0 votes
1 answer

Why is `(True, True, True) == True, True, True` not True in Python?

Operator precedence. You're actually checking equality between (True, ...READ MORE

answered Jan 4, 2023 in Python by Elton
• 400 points
643 views
webinar REGISTER FOR FREE WEBINAR X
REGISTER NOW
webinar_success Thank you for registering Join Edureka Meetup community for 100+ Free Webinars each month JOIN MEETUP GROUP