I don't understand this result

I don't understand this result - Printable Version

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I don't understand this result - Ponomarenko Pavlo - Jan-14-2017

>>> f = [].extend(['spam', 32, 44])
>>> type(f)
<class 'NoneType'>

RE: I don't understand this result - snippsat - Jan-14-2017

>>> f = [].extend(['spam', 32, 44])
>>> f
>>> repr(f)
'None'

You need to define a list fist,then extend it.

>>> lst = []
>>> lst.extend(['spam', 32, 44])
>>> lst
['spam', 32, 44]

RE: I don't understand this result - buran - Jan-14-2017

extend changes the list in place (and thus return None)

>>> f = [].extend(['spam', 32, 44])
>>> type(f)
<type 'NoneType'>
>>> f=[]
>>> f.extend(['spam', 32, 4])
>>> type(f)
<type 'list'>
>>> print f
['spam', 32, 4]

RE: I don't understand this result - Kebap - Jan-15-2017

>>> f = [] + ['spam', 32, 44]
>>> type(f)