Find
find is a Python string method that returns the lowest index of a specified substring, or -1 when the substring is absent.
Python How-To
The Python str.find method returns the lowest index at which a specified substring occurs, or -1 if it is absent.
- How it is used
- Uses string substring searches where absence should produce a testable result instead of an exception.
- How deep it goes
- Defines the return values, string-only scope, and basic conditional pattern, but does not explain implementation internals.
- Examples
- Demonstrates checking a returned index and filtering task titles, descriptions, and completion notes.
- What you can do after
- Apply it via Python strings to locate substrings and branch safely when no match exists.
Get Programming: Learn to code with Python
find is a Python string method that returns the lowest index of a specified substring or -1 when the substring is absent.
- How it is used
- Uses substring searches to inspect text and locate separators in user input.
- How deep it goes
- Explains case sensitivity, indexing, first matches, missing matches, and a slicing application, but stops short of implementation internals.
- Examples
- Demonstrates searches in "some_string" and "me myself and I", then splits names such as "Aqua Man" using a space.
- What you can do after
- Apply it to locate substrings or separators, test whether text is present, and guide string slicing.
Read how Get Programming: Learn to code with Python explains find →
Related concepts
- indexingproduces · Indexing is the organization or use of positions, keys, or lookup structures to identify and retrieve selected data or elements.
- string moduleuses · The string module is a Python standard-library module providing constants and utilities for processing text and character classes.
- __str__part of · __str__ is a Python special method that returns an object's informal, human-readable string representation.
- substringuses · A substring is a contiguous sequence of characters contained within a larger string or character sequence.
- rfindalternative to · rfind is a Python string method that returns the highest index at which a specified substring begins, or -1 if it is absent.
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