string methods (warning, newbie)

[Christos TZOTZIOY Georgiou]

On Sun, 27 Feb 2005 18:12:17 -0700, rumours say that Steven Bethard
<steven.bethard at gmail.com> might have written:

[snip Nick Coghlan's list comprehension]

[STeVe]
>On the other hand, filter doesn't do the same thing:
>
>py> s = u'The Beatles - help - 03 - Ticket to ride'
>py> filter(str.isalpha, s)
>Traceback (most recent call last):
>   File "<interactive input>", line 1, in ?
>TypeError: descriptor 'isalpha' requires a 'str' object but received a 
>'unicode'
>py> ''.join(c for c in s if c.isalpha())
>u'TheBeatleshelpTickettoride'

This works though:

.>> filter(type(s).isalpha, s)

-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...