how to test if something is a sequence? - Printable Version +- Python Forum (https://python-forum.io) +-- Forum: Python Coding (https://python-forum.io/forum-7.html) +--- Forum: General Coding Help (https://python-forum.io/forum-8.html) +--- Thread: how to test if something is a sequence? (/thread-42277.html) |
how to test if something is a sequence? - Skaperen - Jun-09-2024 how to test if something is a sequence (as opposed to merely a list)? RE: how to test if something is a sequence? - Gribouillis - Jun-10-2024 Use perhaps collections.abc.Iterable isinstance(obj, Iterable) Documentation Wrote:The only reliable way to determine whether an object is iterable is to call iter(obj) RE: how to test if something is a sequence? - Kelly_Doyle - Jun-10-2024 To test if something is a sequence rather than just a list, you can check if it has a specific order or arrangement that follows a pattern or progression. Sequences typically exhibit a logical or numerical progression, whereas lists may not necessarily have a defined order. It's about identifying the underlying structure and patterns within the data. RE: how to test if something is a sequence? - snippsat - Jun-10-2024 There is from collections.abc import Sequence .In Python, a sequence is an abstract data type that represents an ordered collection of items. from collections.abc import Sequence def is_sequence(obj): return isinstance(obj, Sequence) >>> example_list = [1, 2, 3] >>> is_sequence(example_list) True >>> example_string = "123" >>> is_sequence(example_string) TrueDictionaries and sets return False because they are not considered sequences in the context of the Sequence abstract base class. >>> example_dict = {1: "a", 2: "b", 3: "c"} >>> is_sequence(example_dict) False >>> example_set = {1, 2, 3} >>> is_sequence(example_set) False RE: how to test if something is a sequence? - perfringo - Jun-11-2024 (Jun-09-2024, 11:54 PM)Skaperen Wrote: how to test if something is a sequence (as opposed to merely a list)? List is sequence so there is no opposition. Python documentation > Glossary > sequence: Quote:sequence RE: how to test if something is a sequence? - Skaperen - Jun-11-2024 does that mean i can't use an int to index a mapping? or is an int mutable (i don't think so)? |