python-regexHow to compile a regex in Python?

Compiling a regular expression in Python is a process of converting a regular expression pattern into a regular expression object. This object can be used for pattern matching.

import re

# Compile the regular expression
pattern = re.compile("\d+")

# Use the compiled regular expression
result = pattern.match("123")

print(result)

Output example

<re.Match object; span=(0, 3), match='123'>

The code above consists of the following parts:

1. import re - imports the re module which contains the functions for working with regular expressions.
2. pattern = re.compile("\d+") - compiles the regular expression pattern \d+ into a regular expression object.
3. result = pattern.match("123") - uses the compiled regular expression object to match the string 123.
4. print(result) - prints the result of the match.

Helpful links

• Python Regular Expression Documentation
• Regular Expression HOWTO

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