Python - re.compile() Last Updated : 30 Dec, 2024 Summarize Comments Improve Suggest changes Share Like Article Like Report In Python, re.compile() from the re module creates a regex object from a regular expression pattern. This object lets you perform operations like search(), match(), and findall(). In this article, we will understand about re.compile() method. Python import re # Compile the pattern pattern = re.compile(r'\d+') # Search for digits in a string result = pattern.search("I have 3 cats.") if result: print(result.group()) Output3 Table of ContentSyntax of re.compile() Without using flagsWith Using Flags Syntax of re.compile() re.compile(pattern, flags=0)Parameters:pattern (str):The regular expression pattern you want to compile.Example: r'\d+' (matches one or more digits).flags (optional):Modifiers that change the behavior of the regex.Common flags:re.IGNORECASE or re.I: Ignore case sensitivity.re.MULTILINE or re.M: Allow ^ and $ to match start and end of lines.re.DOTALL or re.S: Allow . to match newline characters.re.VERBOSE or re.X: Allow adding comments and whitespace for better readability.Without using flagsIn this code we are not using flags which is an optional parameter: Python import re # Compile a regex pattern pattern = re.compile(r'\d{3}-\d{2}-\d{4}') # Use the compiled pattern to match text = "My SSN is 123-45-6789." match = pattern.search(text) if match: print(f"Found: {match.group()}") OutputFound: 123-45-6789 With Using Flags In this code we are using flags (Modifiers that change the behavior of the regex.) Python import re # Compile a case-insensitive regex pattern = re.compile(r'hello', re.IGNORECASE) # Use the compiled pattern text = "Hello, GeeksforGeeks!" match = pattern.search(text) if match: print(f" {match.group()}") Output Hello Comment More infoAdvertise with us Next Article Python - re.compile() H harshitwn5p Follow Improve Article Tags : Python python-regex python Practice Tags : pythonpython Similar Reads re.compile() in Python The re.compile() method in Python is used to compile a regular expression pattern into a regex object. Compiling a pattern makes it more efficient when we need to use the same pattern several times, as it avoids re-compiling the pattern each time. Letâs look at how re.compile() works and when we sho 3 min read Python compile() Function Python is a high-level, general-purpose, and very popular programming language. In this article, we will learn about the Python compile() function. Python compile() Function SyntaxPython compile() function takes source code as input and returns a code object that is ready to be executed and which ca 3 min read Python - re.purge() method re.purge() in Python clears the cache of compiled regular expressions, freeing memory. Itâs rarely needed, as Python efficiently manages the regex cache. Use it only if working with many patterns and memory is a concern.import rere.purge()Pythonimport re # Compile some regular expressions pattern1 = 2 min read Python Compiler Using Django In this article, we will explore the creation of a Python compiler using Django. Users can input their Python code into the designated code area, and upon clicking the "Run" button, the compiler will generate the corresponding output. What is Python Compiler?A Python compiler is a program or tool th 4 min read re.findall() in Python re.findall() method in Python helps us find all pattern occurrences in a string. It's like searching through a sentence to find every word that matches a specific rule. We can do this using regular expressions (regex) to create the pattern and then use re.findall() to get a list of matches.Let's say 2 min read Like