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Add note about regexp
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‎docs/python/language/regexp.ipynb‎

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{
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"cells": [
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{
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"cell_type": "markdown",
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"id": "09c07f20",
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"metadata": {},
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"source": [
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"# Regular Expressions"
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]
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},
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{
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"cell_type": "markdown",
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"id": "e732250f",
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"metadata": {
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"vscode": {
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"languageId": "markdown"
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}
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},
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"source": [
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"Python regular expressions (regex) are compact pattern descriptions written in a special mini-language that let you search, match, extract, and transform substrings in text. In Python the built-in re module provides functions to compile and apply these patterns, supporting character classes, quantifiers, grouping, and lookaround assertions for powerful text processing."
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]
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},
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{
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"cell_type": "markdown",
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"id": "52df4454",
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"metadata": {},
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"source": [
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"## Module"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 1,
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"id": "48f23a79",
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"metadata": {
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"vscode": {
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"languageId": "markdown"
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}
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},
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"outputs": [],
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"source": [
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"import re"
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]
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},
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{
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"cell_type": "markdown",
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"id": "d2a3c9d6",
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"metadata": {
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"vscode": {
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"languageId": "markdown"
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}
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},
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"source": [
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"## search()"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 12,
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"id": "f6ddbca4",
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"Match Found\n"
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]
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}
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],
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"source": [
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"import re\n",
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"txt = \"Python is a programming language\"\n",
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"x = re.search(\"^Python.*language$\", txt)\n",
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"if x is not None:\n",
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" print(\"Match Found\")\n",
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"else:\n",
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" print(\"Match not found\")"
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]
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},
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{
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"cell_type": "markdown",
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"id": "e0670547",
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"metadata": {},
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"source": [
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"## findall()"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 14,
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"id": "20477ea4",
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"['i', 'i']\n"
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]
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}
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],
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"source": [
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"import re\n",
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"\n",
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"txt = \"Python is a programming language\"\n",
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"x = re.findall(\"i\", txt)\n",
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"print(x)"
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]
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},
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{
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"cell_type": "markdown",
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"id": "7f8af177",
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"metadata": {},
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"source": [
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"## split()"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 25,
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"id": "03221334",
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"['Python', 'is', 'a', 'programming', 'language']\n"
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]
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}
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],
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"source": [
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"import re\n",
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"\n",
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"txt = \"Python is a programming language\"\n",
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"x = re.split(r\"\\s\", txt)\n",
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"print(x)"
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]
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},
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{
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"cell_type": "markdown",
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"id": "7f86aad6",
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"metadata": {},
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"source": [
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"## sub()"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 26,
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"id": "0e767b5e",
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"PythonXisXaXprogrammingXlanguage\n"
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]
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}
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],
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"source": [
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"import re\n",
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"\n",
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"txt = \"Python is a programming language\"\n",
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"x = re.sub(r\"\\s\", \"X\", txt)\n",
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"print(x)"
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]
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},
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{
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"cell_type": "markdown",
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"id": "92b1c021",
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"metadata": {},
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"source": [
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"## Match Object"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 41,
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"id": "33cee649",
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"Python is #\n"
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]
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}
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],
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"source": [
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"import re\n",
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"\n",
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"txt = \"Python is #1 programming language\"\n",
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"x = re.search(r\"\\D+\", txt)\n",
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"if x is not None:\n",
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" print(x.group())\n",
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"else:\n",
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" print(\"No match found\")\n"
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]
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}
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],
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"metadata": {
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"kernelspec": {
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"display_name": "notes (3.12.0)",
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"language": "python",
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"name": "python3"
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},
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"language_info": {
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"codemirror_mode": {
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"name": "ipython",
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"version": 3
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},
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"file_extension": ".py",
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"mimetype": "text/x-python",
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"name": "python",
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"nbconvert_exporter": "python",
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"pygments_lexer": "ipython3",
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"version": "3.12.0"
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}
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},
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"nbformat": 4,
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"nbformat_minor": 5
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}

‎mkdocs.yml‎

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- Lists: python/language/lists.ipynb
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- Modules: python/language/modules.ipynb
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- Strings: python/language/strings.ipynb
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- Regular Expressions: python/language/regexp.ipynb
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- Exceptions: python/language/exceptions.ipynb
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- Tuples: python/language/tuples.ipynb
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- Dictionaries: python/language/dictionaries.ipynb

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