Regular Expressions Search in list

Question

I want to filter strings in a list based on a regular expression   Is there something better than  x for x in list if r match x

User · Accepted Answer

You can create an iterator in Python 3 x or a list in Python 2 x by using   filter r match  list    To convert the Python 3 x iterator to a list  simply cast it  list filter

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Full Example  Python 3   For Python 2 x look into Note below  import re  mylist     dog    cat    wildcat    thundercat    cow    hooo   r   re compile    cat   newlist   list filter r match  mylist     Read Note print newlist    Prints     cat    wildcat    thundercat       Note   For Python 2 x developers  filter returns a list already  In Python 3 x filter was changed to return an iterator so it has to be converted to list  in order to see it printed out nicely    Python 3 code example  Python 2 x code example

User · Answer

To do so without compiling the Regex first  use a lambda function - for example  from re import match  values     123    234    foobar   filtered values   list filter lambda v  match    d     v   values    print filtered values   Returns    123    234    filter   just takes a callable as it s first argument  and returns a list where that callable returned a  truthy  value

[python] Regular Expressions: Search in list

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