Python regular expressions return true false

Question

Using Python regular expressions how can you get a True False returned  All Python returns is    lt  sre SRE Match object at     gt

User · Answer

One way to do this is just to test against the return value. Because you're getting <_sre.SRE_Match object at ...> it means that this will evaluate to true. When the regular expression isn't matched you'll the return value None, which evaluates to false.

import re

if re.search("c", "abcdef"):
    print "hi"

Produces hi as output.

User · Answer

If you really need True or False  just use bool   gt  gt  gt  bool re search  hi    abcdefghijkl    True  gt  gt  gt  bool re search  hi    abcdefgijkl    False   As other answers have pointed out  if you are just using it as a condition for an if or while  you can use it directly without wrapping in bool

User · Answer

Match objects are always true  and None is returned if there is no match  Just test for trueness   if re match

User · Answer

You can use re match   or re search    Python offers two different primitive operations based on regular expressions  re match   checks for a match only at the beginning of the string  while re search   checks for a match anywhere in the string  this is what Perl does by default   refer this

User · Answer

Ignacio Vazquez-Abrams is correct  But to elaborate  re match   will return either None  which evaluates to False  or a match object  which will always be True as he said  Only if you want information about the part s  that matched your regular expression do you need to check out the contents of the match object

User · Answer

Here is my method   import re   Compile p   re compile r hi     Match and print print bool p match  abcdefghijkl

[python] Python regular expressions return true/false

Examples related to python

Examples related to regex