TypeError: method() takes exactly 2 arguments (3 given)

Question

Here is a code:

class Child(object):
    def chunks(l, n):
        """ Yield successive n-sized chunks from l.
        """
        for i in xrange(0, len(l), n):
            yield l[i:i+n]

k= range(1, 10)
print k
print Child().chunks(k,2)

When I execute this code, python throws following error:

[1, 2, 3, 4, 5, 6, 7, 8, 9]

Traceback (most recent call last):

File "/home/Sample.py", line 19, in

print Child().chunks(k,2)

TypeError: chunks() takes exactly 2 arguments (3 given)

Please find my snippet !

@Kay TypeError: chunks() takes exactly 2 arguments (3 given) , I need a explanation — Jay Venkat, May 15 '15 at 10:03
`self` is passed automatically, so you are actually passing `(self, k, 2)` (3 arguments) to the `chunks` method, but it is defined to accept `(l, n)` (2 arguments), hence the error. Edit in Kay's answer and see for yourself! — Matthew, May 15 '15 at 10:07
There is clearly *no need* for `chunks` to be in `Child`; just make it a function. — jonrsharpe, May 15 '15 at 10:18

score 2 · Accepted Answer · edited Nov 03 '18 at 04:53

2

Instance method: A method that is defined inside a class and belongs only to the current instance of a class.

Define chunks method as instance method in class.

e.d

class Child(object):
    def chunks(self, l, n):
        #      ^^^   
        pass
        # do coding

Static Method:

class Child(object):
    @staticmethod
    def chunks(l, n):
        pass
        # do coding

edited Nov 03 '18 at 04:53

Justapigeon

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answered May 15 '15 at 10:11

Vivek Sable

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TypeError: method() takes exactly 2 arguments (3 given)

1 Answers1