In Python, when should you use lists and when tuples? Sometimes you don't have a choice, for example if you have "hello %s you are %s years old" % x then x must be a tuple.

Summary Tuples tend to perform better than lists in almost every category: Tuples can be constant folded. Tuples can be reused instead of copied. Tuples are compact and don't over-allocate. Tuples …

Mar 9, 2009 · What are the differences between lists and tuples, and what are their respective advantages and disadvantages?

Sep 9, 2014 · In Python, a list is sometimes converted into a tuple for use as a dictionary key, because Python dictionary keys need to be immutable (i.e. constant) values, whereas Python lists are mutable …

Jul 28, 2010 · A useful variant of tuple is its sub-type collections.namedtuple (requires Python 2.6 or better) which lets you access items by name (with attribute syntax) as well as by index (the normal …

With regard to "Should I store tuples or lists in my list?", a rule of thumb is to make things as immutable as possible. If you don't need to modify the sublists in place, make them tuples.

Unpacking a list / tuple of pairs into two lists / tuples [duplicate] Asked 14 years, 2 months ago Modified 2 years, 10 months ago Viewed 259k times

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On top of that I would like to alter the tuples in the list. Standard practice is to avoid changing a list while also iterating through it, so what should I do?

I have confused with lists, tuples, sets and dictionaries someone give me clear cut idea. Give me the difference from your understanding don't give the text book definitions.