Tuples

• Like List tuples are also ordered collection of data
• Unchangeable
• Itreable
• Can be heterogeneous

In Python tuples are written with round brackets.

Creation of Tuple:

t = tuple()
print(type(t))

t1 = ()
print(type(t1))

t1 = (1,2,3,4,"Rushikesh",2.4)
print(type(t1))

#Return 
<class 'tuple'>
<class 'tuple'>
<class 'tuple'>        

Note : Tuple with only one element

t2 = (2)
print(type(t2))

#Return -
<class 'int'>

********** We need to add , After first eleement *******
t2 = (2,)
print(type(t2))

Now it will return 
<class 'tuple'>        

Tuples Support Indexing ,slicing As List :

t1 = (1,2,3,4,"Rushikesh",2.4)
print(type(t1))
print(t1[1])
print(t1[1:4])

#Return - 
2
(2, 3, 4)        

When we try to change tuples element it will throw an error (Immutable/Unchangeable)

t1 = (1,2,3,4,"Rushikesh",2.4)
t1[4] = "Rahul"
print(t1)

#Return -
Traceback (most recent call last):
  File "C:\Users\Rushi Reddy\OneDrive\文档\Desktop\Python\Practice\DataStructure\tuples.py", line 5, in <module>
    t1[4] = "Rahul"
    ~~^^^
TypeError: 'tuple' object does not support item assignment        

Mutablility In Tuples:

Note :Tuples are immutable but list inside tuples are mutable we can change the list element

t1 = ([1,2,3,4],"Rushikesh")
print(t1)         #Return - ([1,2,3,4],"Rushikesh")
print(type(t1))   #Return <class 'tuple'>
print(type(t1[0]))#Rerurn <class 'list'>
## t1[0][1] is list element so we can the list item 
t1[0][1] = 3
print(t1)         #Return - ([1, 3, 3, 4], 'Rushikesh')        

Unpacking Tuples:

When we create a tuple, we normally assign values to it. This is called "packing" a tuple

But Python, we are also allowed to extract the values back into variables. This is called "unpacking".

t1 = ("Rushikesh","sanjay","jethure")
print(t1)
firstname,father_name,surname = t1
print(firstname)
print(father_name)
print(surname)

#Return - 
('Rushikesh', 'sanjay', 'jethure')
Rushikesh
sanjay
jethure        

Tuples Method :

1)count() : Returns the number of times a specified value occurs in a tuple

tup1 = (1,1,1,3,4,5,6,7)
print(tup1.count(1))
print(tup1.count(9))

#Return -
3
# 9 Is not in tuple so it will return -- 0        

2)index() : Searches the tuple for a specified value and returns the position of where it was found

tup1 = (1,1,1,3,4,5,6,7)
print(tup1.index(1,2,5))

#Return -
2        

Iteration:

tup1 = (1,1,1,3,4,5,6,7)
for i in tup1:
    print(i)

#Return -
1
1
1
3
4
5
6
7        

Concatenation:(+,*)

tup1 = (1,2,3,4,5)
tup2 = (6,7,8)
tup3 = tup1 + tup2
print(tup3)
print(tup3 * 2 )

# Return -
(1, 2, 3, 4, 5, 6, 7, 8)
(1, 2, 3, 4, 5, 6, 7, 8, 1, 2, 3, 4, 5, 6, 7, 8)        

Convert Tuples into list and list into tuples:

If We have to change the tuples element we can convert tuple into list and we can chnage the element of that converted list and then we can again covert it into tuple

tup1 = (1,2,3,4,5)
print(type(tup1))
lst = list(tup1)
print(type(lst))
print(lst[2])
lst[2] = 100
print(lst)
tup2 = tuple(lst)
print(tup2)
print(type(tup2))

#Return -
<class 'tuple'>
<class 'list'>
3
[1, 2, 100, 4, 5]
(1, 2, 100, 4, 5)
<class 'tuple'>