hong Yu wrote:
> I am new to python.
> I was confused:
>
> >>> a = list('hello')
>
> >>> a
> ['h', 'e', 'l', 'l', 'o']
>
> I want to combine the items in the list into a string.
> So:
>
> >>> ''.join(a)
> 'hello'
>
> but:
>
> >>> str.join(a)
> Traceback (most recent call last):
> File "<stdin>", line 1, in ?
> TypeError: descriptor 'join' requires a 'str' object but received a
'list'
>
> So why TypeError raised?
> and
> What's the difference between str and 'hello' ?
>
> Thanks a lot.
str is a class, 'hello' is instance of the class; the method join
expects to receive an instance as its first parameter so:-
>>> str.join( '', a )
'hello'
Regards, Paul
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