Page 400 - Computer Science V2.0 Class 11

(30, 'September', 1987)
>>> bDay, bMonth, bYear = (30, 'September', 1987)
>>> bDay, bMonth, bYear
(30, 'September', 1987)
>>> (bDay, bMonth, bYear) = 30, 'September', 1987
>>> bDay, bMonth, bYear
(30, 'September', 1987)
>>> (bDay, bMonth, bYear) = (30, 'September', 1987)
>>> bDay, bMonth, bYear
(30, 'September', 1987)
Note that in each of the above examples, the tuple on the right hand side of the assignment operator is assigned to
the tuple on the left hand side.

13.7.3 Indexing
We are already familiar with indexing. Indeed, indexing may also be applied to tuples. A tuple is an immutable object
and an attempt to substitute an element of a tuple by another value yields type error because the tuple does not
support assignment to its elements.
Example:
>>> bDate = (30,'September',1987)
>>> len(bDate)
3
>>> bDate[:-1]
(30, 'September')
>>> bDate[0] = 20
Traceback (most recent call last):
File '<pyshell#213>', line 1, in <module>
bDate[0] = 20
TypeError: 'tuple' object does not support item assignment
13.7.4 Slicing
We are already familiar with slicing in the context of strings and lists. Slicing is also applicable to tuples. For example,

>>> myTuple = (22, 30, 'Hello', 2.4, 2, 'Python', (890,900), 45)

>>> myTuple[1:4] # yields a tuple comprising 2nd to 4th element
(30, 'Hello', 2.4)
>>> myTuple[:4] # yields a tuple comprising 1st to 4th element
(22, 30, 'Hello', 2.4)
>>> myTuple[4:] # yields a tuple comprising 5th to last element
(2, 'Python', (890, 900), 45)
>>> myTuple[:] # yields a tuple comprising 1st to last element
(22, 30, 'Hello', 2.4, 2, 'Python', (890, 900), 45)
>>> myTuple[::2] # yields a tuple comprising alternate elements, starting index 0
(22, 'Hello', 2, (890, 900))
>>> myTuple[-4] # yields fourth element from the right end
2
>>> myTuple[::-1] # yields a tuple in reverse order
(45, (890, 900), 'Python', 2, 2.4, 'Hello', 30, 22)

What will be the output produced on the execution of following code?

tuple1 = 30, 40
tuple2 = (30, 40)
print(tuple1 == tuple2)
print(tuple1[1])

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