Replace method
A replace operation substitutes selected matching content or values with specified alternatives in a string, collection, or other object, either returning a result or modifying the object.
The Quick Python Book, Fourth Edition
replace is a Python string method that returns a copy with occurrences of a specified substring replaced by another string, optionally limiting the number of replacements.
- How it is used
- Supports substring substitution and punctuation removal before splitting text into words.
- How deep it goes
- Defines the two required arguments and immutable return value, but defers details of the optional third argument to documentation.
- Examples
- Shows `ss` replaced in `Mississippi` and periods and commas removed from lowercased file text.
- What you can do after
- Practice/perform substring substitution and basic text normalization while choosing translate for numerous character substitutions.
Read how The Quick Python Book, Fourth Edition explains replace method →
Graph Algorithms for Data Science
The Cypher replace function returns a string formed by replacing occurrences of a specified substring with another string.
- How it is used
- Cleans tweet text and normalizes hashtag tokens before splitting, filtering, counting, or storing extracted tags.
- How deep it goes
- Defines the three-argument syntax and demonstrates two practical replacements, but does not develop replacement semantics beyond basic usage.
- Examples
- Uses newline cleanup and comma removal while extracting hashtags from non-retweet tweets.
- What you can do after
- Apply it via Cypher to normalize strings inside a text-processing query.
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Secrets of the JavaScript Ninja, Second Edition
A JavaScript String method that returns a new string with matched text replaced by specified text or text produced by a callback.
- How it is used
- Replaces regular-expression matches with fixed text or callback-generated text.
- How deep it goes
- Explains global matching and callback arguments with worked examples, without detailing implementation internals.
- Examples
- Demonstrates uppercase substitution, camel-case conversion, and query-string compression.
- What you can do after
- Apply String.replace() with regexes and callbacks to transform matched text or process repeated matches.
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100 Java Mistakes and How to Avoid Them
The Java String.replace method returns a string in which matching occurrences of a target character or sequence are replaced with a specified replacement character or sequence.
- How it is used
- Applies literal substring replacement while preventing regex-related and expression-precedence mistakes.
- How deep it goes
- Explains literal matching, replacement scope, precedence failures, regex hazards, and static-analysis assistance through focused examples.
- Examples
- Uses multiline HTML templates, user placeholders, literal usernames, and regex replacement-group failures.
- What you can do after
- Diagnose ineffective replacements and select replace(), replaceAll(), or replaceFirst() according to matching and replacement requirements.
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Get Programming: Learn to code with Python
replace is a Python string method that returns a string with occurrences of one substring substituted by another substring.
- How it is used
- Revises text by substituting every occurrence of one substring with another.
- How deep it goes
- Demonstrates the two-argument form with worked replacements and quick checks, without descending into implementation details.
- Examples
- Uses spaces, letters, removed substrings, punctuation, and translated words as replacement examples.
- What you can do after
- Apply it via Python to replace, remove, or revise matching substrings in a string.
Read how Get Programming: Learn to code with Python explains replace method →
Related concepts
- Mapuses · A map is an associative data structure that stores key-value pairs and supports retrieving values by key.
- regular expressionuses · A formal pattern notation that describes sets of strings and enables text to be matched, searched, extracted, or transformed.
- translatealternative to · str.translate is a Python string method that returns a copy with characters transformed or deleted according to a translation table.
- functionuses · A function is a callable program unit that performs an operation, may accept inputs, and can produce a result or side effect.
- substringuses · A substring is a contiguous sequence of characters contained within a larger string or character sequence.
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