Debug Mode

Verbose Mode

The re.DEBUG flag provides debugging information while compiling a regular expression. Let’s have a look at the below code.

Python3

import re 
  
  
match = re.search(r'(?P<first_two>[\d]{2})-(?P<last_three>[\d]{3})',\ 
                  '25-542', re.DEBUG) 
print(match)

Output

SUBPATTERN 1 0 0
  MAX_REPEAT 2 2
    IN
      CATEGORY CATEGORY_DIGIT
LITERAL 45
SUBPATTERN 2 0 0
  MAX_REPEAT 3 3
    IN
      CATEGORY CATEGORY_DIGIT
<_sre.SRE_Match object; span=(0, 6), match='25-542'>

Here, you have seen different types of flags that can slightly change the behavior of a regular expression engine. You can also use multiple flags at the same time by using a bitwise OR (|) operator.

Python Flags to Tune the Behavior of Regular Expressions

Python offers some flags to modify the behavior of regular expression engines. Let’s discuss them below:

Case Insensitivity
Dot Matching Newline
Multiline Mode
Verbose Mode
Debug Mode

Tags:

#python-regex #Python #python

Verbose Mode

Debug Mode

Python3

Python Flags to Tune the Behavior of Regular Expressions

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