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A single library for content items across the complete Content Area hierarchy. Content Areas and Categories define the structure;

2,376 results

2,376 resultsContent Area → Category

Python List Comprehensions: Build Lists Concisely

A list comprehension creates a list by evaluating an expression for each item in an iterable. It can express a simple transformation in one readable statement. See two practical examples, e…

2 views Oct 17, 2026

Python List Indexing and Negative Indexes

Indexes identify list positions: zero means the first element, one the second, and negative indexes count backward from the end. An empty list has no valid element indexes. See two practica…

2 views Oct 17, 2026

Python List Performance: Appends, Insertions, and Membership Checks

Appending to a list is typically amortized O(1), but inserting at the beginning is O(n) because items shift. Searching for a value in a list is O(n) in the worst case; a set can provide fas…

2 views Oct 17, 2026

Python List Slicing and Step Values

List slicing with [start:stop:step] creates a new list using a half-open interval: start is included and stop is excluded. A negative step traverses backward. See two practical examples, ed…

2 views Oct 17, 2026

Python list.append Method: Usage and Examples

list.append(item) adds one object to the end of a list. If that object is itself a list, it is added as a single nested element. See two practical examples, edge cases and common mistakes.

2 views Oct 17, 2026

Python list.append() vs list.extend(): Usage and Differences

append() adds its argument as one item; extend() adds each element of an iterable individually. Both mutate the existing list and return None. See two practical examples, edge cases and com…

2 views Oct 17, 2026

Python list.clear Method: Usage and Examples

list.clear() removes all items from the existing list and returns None. References to that same list all see the cleared state. See two practical examples, edge cases and common mistakes.

2 views Oct 17, 2026

Python list.copy Method: Usage and Examples

list.copy() returns a shallow copy of a list. The new outer list has the same elements but is a different object. See two practical examples, edge cases and common mistakes.

2 views Oct 17, 2026

Python list.count Method: Usage and Examples

list.count(value) returns how many elements compare equal to the requested value. It is not a count of distinct values or substrings. See two practical examples, edge cases and common mista…

2 views Oct 17, 2026

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