Regular expression to match a dot

Question

Was wondering what the best way is to match  test this  from  blah blah blah test this gmail com blah blah  is  Using Python   I ve tried re split r  b w  w

User · Answer

In the default mode  Dot     matches any character except a newline  If the DOTALL flag has been specified  this matches any character including a newline    python Doc    So  if you want to evaluate dot literaly  I think you should put it in square brackets    gt  gt  gt  p   re compile r  b  w     w      gt  gt  gt  resp   p search  blah blah blah test this gmail com blah blah    gt  gt  gt  resp group    test this

User · Answer

A   in regex is a metacharacter  it is used to match any character  To match a literal dot  you need to escape it  so

User · Answer

In your regex you need to escape the dot      or use it inside a character class        as it is a meta-character in regex  which matches any character    Also  you need  w  instead of  w to match one or more word characters     Now  if you want the test this content  then split is not what you need  split will split your string around the test this  For example    gt  gt  gt  re split r  b w    w     s    blah blah blah     gmail com blah blah       You can use re findall    gt  gt  gt  re findall r  w     w         s      look ahead   test this    gt  gt  gt  re findall r   w     w      s        capture group   test this

User · Answer

This expression      lt   s       s        s          might also work OK for those specific types of input strings   Demo  Test  import re  expression   r    lt     s     s        s         string       blah blah blah test this gmail com blah blah blah blah blah test this  gmail com blah blah blah blah blah test this this gmail com blah blah      matches   re findall expression  string   print matches    Output    test this       If you wish to simplify modify explore the expression  it s been explained on the top right panel of regex101 com  If you d like  you can also watch in this link  how it would match against some sample inputs

User · Answer

to escape non-alphanumeric characters of string variables  including dots  you could use re escape  import re  expression    whatever v1 dfc  escaped expression   re escape expression  print escaped expression   output   whatever  v1  dfc  you can use the escaped expression to find match the string literally

User · Answer

In javascript you have to use    to match a dot   Example   blah tests zibri org  match  test        null   and   blah test zibri org  match  test          test zibri org   index  5  input   blah test zibri org   groups  undefined

[python] Regular expression to match a dot

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