[Tutor] Re: glob or filter help

[Barnaby Scott]

For anyone who doesn't like lambda, how about

import os
def get_fles(exts, upd_dir):
	return [i for i in os.listdir(upd_dir) if i.split('.')[-1] in exts]



 >  -----Original Message-----
 >  From: tutor-bounces+bds=waywood.co.uk at python.org
 >  [mailto:tutor-bounces+bds=waywood.co.uk at python.org]On 
 >  Behalf Of Javier
 >  Ruere
 >  Sent: 22 January 2005 16:25
 >  To: tutor at python.org
 >  Subject: [Tutor] Re: glob or filter help
 >  
 >  
 >  Jay Loden wrote:
 >  > Thanks! That's exactly the kind of feedback I was looking for.  If
 >  it's not
 >  > too much trouble, do you think you could explain how 
 >  lambda works, or
 >  just
 >  > point me towards a lambda explanation/tutorial that a new 
 >  programmer can
 >  > understand?  It seems to give you some great power but I 
 >  really don't
 >  > understand how it works.
 >  
 >    Lambda defines anonymous functions. It has some 
 >  restrictions like that
 >  the function must be expressed in one line and there can be no
 >  assigments. The syntax can be found in [1].
 >    Though I personaly like this keyword, I must say that it 
 >  can make code
 >  less readable so I tend to use it for only for extremely simple
 >  snippets. The example given in the previous mail is almost 
 >  too big. But
 >  then again, one must try things out to learn so use it and 
 >  find your own
 >  balance.
 >    Also the BDFL has said he is unhappy with lambda (and 
 >  filter, reduce
 >  and map) so he may remove this keyword in the future (but not before
 >  Python3000)[2].
 >  
 >  Javier
 >  
 >  [1] http://www.python.org/doc/2.4/ref/lambdas.html
 >  [2] Look in the user list if you want to learn more about 
 >  this topics.
 >  
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