What is the best way to delete strings in a string list that that match certain pattern?

[Steven D'Aprano]

On Fri, 06 Nov 2009 10:16:58 -0600, Peng Yu wrote:

> What is a list-comprehension?

Time for you to Read The Fine Manual.

http://docs.python.org/tutorial/index.html


> I tried the following code. The list 'l' will be ['a','b','c'] rather
> than ['b','c'], which is what I want. It seems 'remove' will disrupt the
> iterator, right? I am wondering how to make the code correct.
> 
> l = ['a', 'a', 'b', 'c']
> for x in l:
>   if x == 'a':
>     l.remove(x)


Oh lordy, it's Shlemiel the Painter's algorithm. Please don't do that for 
lists with more than a handful of items. Better still, please don't do 
that.

http://www.joelonsoftware.com/articles/fog0000000319.html



-- 
Steven