Sequences are iterables that have a length. Sequences are ordered collections (they maintain the order of their contents). The most common sequences built-in to Python are string, tuple, and list.| www.pythonmorsels.com
Python Morsels observe exercise: Refactor to reduce repetition| www.pythonmorsels.com
Python's built-in enumerate function is the preferred way to loop while counting upward at the same time. You'll almost always see tuple unpacking used whenever enumerate is used.| www.pythonmorsels.com
An iterable is anything you're able to iterate over (iter-able). Iterables can be looped over and anything you can loop over is an iterable. Not every iterable is indexable or has a length.| www.pythonmorsels.com
Definitions for colloquial Python terminology (effectively an unofficial version of the Python glossary).| www.pythonmorsels.com