Tuple is an immutable collection of elements (may be of same or different types), which is indexed by a 0-based integer. A 2-tuple can represent a point in 2-D plane, or a 3-Tuple can represent a point in 3-D plane.
x = () # () denotes a tuple type
# or
x = tuple()
x = (2,3,0,'g')
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x = (2,3)
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x
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x = (2,) # x = (2) assigns int 2 to x. To make it a tuple, a comma is appended
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x
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x + (1,2)
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Tuples are immutable. So once a tuple is created, its contents are permanent unless it is reassigned with another tuple.
Tuples can also be Indexed and Sliced like lists
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x
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x = x + (1,3,4) # Reassignment
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x
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x[1]
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x[2:5]
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x[::-1]
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Since tuples are immutable, operations do not modify the original tuple
Here are some of the operations on list. They are member functions of class tuple
. If x
is a tuple,
x.index(ele)
- searches for the given element from the start of the list and returns its index. Throws a ValueError
if the element does not appear (use in
to check without a ValueError).x.count(ele)
- counts the number of occurances of ele
in x
Membership operator in
is also supported
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x
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2 in x
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x.count(2)
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x.index(3)
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Using a list of tuples, one can model a collection of points in space