What's the difference between str and 'hello' ?

[hong Yu]

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.

[Heiko Wundram]

Am Donnerstag, 19. Mai 2005 11:27 schrieb hong Yu:

str.join(a)

Traceback (most recent call last):
File "<stdin>", line 1, in ?
TypeError: descriptor 'join' requires a 'str' object but received a 'list'

What's the difference between str and 'hello' ?

str.join("",a) <=> "".join(a)
(<=> as in equivalence relation)

HTH!

--
--- Heiko.
listening to: Bjork Guðmundsdottir & Trio - Luktar-Gvendur
see you at: http://www.stud.mh-hannover.de/~hwundram/wordpress/

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[paulC]

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