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

Peng Yu pengyu.ut at gmail.com
Fri Nov 6 06:23:12 CET 2009


On Thu, Nov 5, 2009 at 10:25 PM, Chris Rebert <clp2 at rebertia.com> wrote:
> On Thu, Nov 5, 2009 at 8:19 PM, Peng Yu <pengyu.ut at gmail.com> wrote:
>> Suppose I have a list of strings, A. I want to compute the list (call
>> it B) of strings that are elements of A but doesn't match a regex. I
>> could use a for loop to do so. In a functional language, there is way
>> to do so without using the for loop.
>>
>> I'm wondering what is the best way to compute B in python.
>
> Since this sounds rather homework-y, I'll only give you a pointer:
> http://docs.python.org/tutorial/datastructures.html#list-comprehensions

Now, I want to in-place delete elements in A that matches the regex. I
know that I need to use del. But I'm not sure how to use the
functional style programming for this problem. Would you please let me
know?



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