Re.match

Q: How deeply does Tiny Python Projects: Learn coding and testing with puzzles and games cover re.match?

Explains return values, capture groups, quantifiers, optional patterns, and case flags, while stopping short of regex-engine internals.

As explained in Tiny Python Projects: Learn coding and testing with puzzles and games

re.match() is a Python re-module function that attempts to match a regular expression at the beginning of a string and returns a match object or None.

re.match() tests a regular expression at the beginning of a string. It returns a re.Match object when the pattern matches and None otherwise; unlike re.search(), it does not begin searching later in the text. section 14.1.2 section 14.1.3

Split a word at its first vowel

>>> pattern = f'([{consonants}]+)?([aeiou])(.*)' >>> re.match(pattern, 'chair').groups() ('ch', 'a', 'ir') >>> re.match(pattern, 'apple').groups() (None, 'a', 'pple') >>> type(re.match(pattern, 'rdnzl')) <class 'NoneType'> Parentheses create capture groups, ? makes the leading consonants optional, and re.IGNORECASE handles uppercase input. section 14.1.3 section 14.1.3

>>> text = 'chair'
>>> re.match(pattern, text)                 #1
<re.Match object; span=(0, 1), match='c'>   #2

Inspect a successful beginning-of-string match on “chair.” section 14.1.2

How Tiny Python Projects: Learn coding and testing with puzzles and games covers it

Cover of Tiny Python Projects: Learn coding and testing with puzzles and games

liveBook manning.com

Read Tiny Python Projects: Learn coding and testing with puzzles and games on liveBook Get the book at manning.com

Also explained in

liveBook manning.com

Python How-Tore.match tests whether a regular-expression pattern matches beginning at the start of a string and returns a match object when successful.

Compare how 2 books explain re.match →

Related concepts

re.searchcontrasts with · re.search is a Python re-module function that searches a string for the first match of a regular-expression pattern and returns a match object or None.
Noneproduces · None is Python’s singleton object representing the absence of a value or meaningful result.
regular expressionuses · A formal pattern notation that describes sets of strings and enables text to be matched, searched, extracted, or transformed.
string matchproduces · String matching is the computational task of locating or comparing character sequences according to a specified exact or approximate matching criterion.

This explainer was generated by Manning's knowledge graph from the text of Tiny Python Projects: Learn coding and testing with puzzles and games. The section links point to the parts of the book it draws on.