Built-in function
A built-in function is a predefined callable operation supplied by a programming language, runtime, library, or execution environment.
Tiny Python Projects: Learn coding and testing with puzzles and games
list.append() is a Python list method that adds one object as a single new element at the end of the list.
- How it is used
- Builds ordered lists incrementally, especially while collecting values or assembling output lines.
- How deep it goes
- Explains one-argument behavior, nested-list results, assertions, and the distinction from extend(), but does not cover implementation internals.
- Examples
- Demonstrates picnic items, a ransom-text accumulator, and Christmas-verse lines.
- What you can do after
- Apply list.append() to collect single values, verify mutations with assertions, and diagnose accidental nesting against extend().
The Quick Python Book, Fourth Edition
append is a Python list method that adds one object to the end of a list.
- How it is used
- Uses append for the common task of adding a single object to the end of a mutable list.
- How deep it goes
- Defines the method, demonstrates its output, and contrasts nested-list behavior with extend and slice assignment.
- Examples
- Demonstrates appending a string, appending a list as one nested element, and extending a list element by element.
- What you can do after
- Apply it via Python list syntax to add individual objects and choose extend when list contents should be merged.
Read how The Quick Python Book, Fourth Edition explains built-in function →
Related concepts
- slicinguses · Slicing selects or partitions a portion of an indexed sequence or multidimensional array, often along specified indices or dimensions.
- slice lengthuses · Slice length is the number of elements currently contained in a slice and accessible through its indices.
- nil sliceuses · A nil slice is a Go slice value with no backing array, zero length, zero capacity, and a nil value.
- listpart of · A list is an ordered collection of elements arranged in a sequence.
- extend methodcontrasts with · The Python list extend method appends each element of an iterable to the end of a list in iteration order.
- isinstanceincludes · isinstance is a Python built-in function that tests whether an object is an instance of a specified class or tuple of classes, including subclasses.
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