Lesson - 18 : Python3 - Python Variables : Tuple

Published: 17 December 2017
on channel: Sada Learning Hub

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Python DataType : Tuple:
A tuple is a container which holds a series of comma-separated values (items or elements) between parentheses. Tuples are immutable (i.e. you cannot change its content once created) and can hold mix data types.

Tuples are a group of values like a list and are manipulated in similar ways. But, tuples are fixed in size once they are assigned. In Python the fixed size is considered immutable as compared to a list that is dynamic and mutable. Tuples are defined by parenthesis ().
myGroup = ('Rhino', 'Grasshopper', 'Flamingo', 'Bongo')

Here are some advantages of tuples over lists:
Elements to a tuple. Tuples have no append or extend method.
Elements cannot be removed from a tuple.
You can find elements in a tuple, since this doesn’t change the tuple.
You can also use the in operator to check if an element exists in the tuple.
Tuples are faster than lists. If you’re defining a constant set of values and all you’re ever going to do with it is iterate through it, use a tuple instead of a list.
It makes your code safer if you “write-protect” data that does not need to be changed.

Built-in Tuple Functions :
cmp(tuple1, tuple2) : Compares elements of both tuples.
len(tuple) : Gives the total length of the tuple.
max(tuple) : Returns item from the tuple with max value.
min(tuple) : Returns item from the tuple with min value.
tuple(seq) : Converts a list into tuple.

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