python s re return True if string contains regex pattern

Question

I have a regular expression like this   regexp   u ba r z d     Function must return True if word contains bar  baz or bad  In short  I need regexp analog for Python s   any-string  in  text    How can I realize it  Thanks

User · Answer

Match objects are always true  and None is returned if there is no match  Just test for trueness   Code    gt  gt  gt  st    bar   gt  gt  gt  m   re match r ba r z d   st   gt  gt  gt  if m          m group 0       bar    Output   bar  If you want search functionality   gt  gt  gt  st    bar   gt  gt  gt  m   re search r ba r z d   st   gt  gt  gt  if m is not None          m group 0       bar    and if regexp not found than   gt  gt  gt  st    hello   gt  gt  gt  m   re search r ba r z d   st   gt  gt  gt  if m          m group 0      else        print  no match      no match   As  bukzor mentioned if st   foo bar than match will not work  So  its more appropriate to use re search

User · Answer

import re word    fubar  regexp   re compile r ba rzd    if regexp search word     print  matched

User · Answer

You can do something like this   Using search will return a SRE match object  if it matches your search string    gt  gt  gt  import re  gt  gt  gt  m   re search u ba r z d     bar    gt  gt  gt  m  lt  sre SRE Match object at 0x02027288 gt   gt  gt  gt  m group    bar   gt  gt  gt  n   re search u ba r z d     bas    gt  gt  gt  n group     If not  it will return None  Traceback  most recent call last     File   lt pyshell 17 gt    line 1  in  lt module gt      n group   AttributeError   NoneType  object has no attribute  group    And just to print it to demonstrate again    gt  gt  gt  print n None

User · Answer

Here s a function that does what you want   import re  def is match regex  text       pattern   re compile regex  text      return pattern search text  is not None   The regular expression search method returns an object on success and None if the pattern is not found in the string  With that in mind  we return True as long as the search gives us something back   Examples    gt  gt  gt  is match  ba rzd     foobar   True  gt  gt  gt  is match  ba zrd     foobaz   True  gt  gt  gt  is match  ba zrd     foobad   True  gt  gt  gt  is match  ba zrd     foobam   False

User · Answer

The best one by far is   bool re search  ba rzd     foobarrrr      Returns True

[python] python's re: return True if string contains regex pattern

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