The Smartest Way to Learn Python Regular Expressions. Learn the Best-Kept Productivity Secret of Code Masters

Table of Contents
Introduction
Applications
About
Puzzle Learning
Basics
	What's a Regex Pattern?
	The Method to Find All Matches
	Summary
Special Symbols
	Literal Characters
	Summary
Character Sets
	What's a Character Set?
	Negative Character Set
	Summary
	Intermezzo: Match Function
	Methods re.match() vs re.findall()
	re.fullmatch()
	Methods re.fullmatch() vs re.match()
Dot Regex
	What's the Dot Regex?
	Intermezzo: Flags
	Match Newline
	Match the Dot Character
	Summary
Asterisk Quantifier
	What's the Asterisk Quantifier?
	Asterisk Example
	Match the Asterisk Character
	Summary
Plus Quantifier
	What's the Plus Quantifier?
	Plus (+) Quantifiers Examples
	Match the Plus (+) Symbol
	Summary
? Quantifier
	Definition Question Mark
	Summary
Quantifier Differentiation
	Asterisk vs Plus
	Asterisk vs Question Mark
		Question Mark vs Plus
Greediness
	Regex Quantifiers
	Greedy Match
	Non-Greedy Match
	Non-Greedy Question Mark (??)
	Non-Greedy Asterisk (*?)
	Non-Greedy Plus (+?)
	Greedy vs Non-Greedy
	Which is Faster?
	Summary
Line and String Boundaries
	Start-of-String (^)
	Start-of-Line (^)
	End of String ($)
	End of Line ($)
	Intermezzo: Regex Methods
	Match Caret (^) or Dollar ($) Symbols
	Summary
OR Regex
	What's the OR | Operator?
	Examples
	Nested OR
	Character Set OR
	Match the Vertical Line |
	Summary
AND Regex
	Ordered Regex AND Operator
	Unordered Regex AND Operator
	Summary
NOT Regex
Matching Groups
	Simple Matching Groups
	First Matching Group
	Other Matching Groups
	Named Groups
	Non-Capturing Groups
	Positive Lookahead
	Negative Lookahead
	Group Flags
	Summary
Split Method
	re.split()
	Minimal Example
	Maxsplit Argument
	Optional Flag Argument
	Regex Versus String Split
	Summary
Substitution Method
	re.sub()
	Minimal Example
	count Argument
	Optional Flag Argument
	Regex Sub Versus String Replace
	Remove Regex Pattern
	Summary
Compile Method
	re.compile()
	Regular Expression Object
	Discussion
	Summary
Bonus Puzzles
Final Remarks
	Where to go from here?