TUPLE IN PYTHON

Tuple is used to represent group of elements into a single entity. Tuple objects are immutable objects i.e., once if you create tuple object with some element, later we cannot modify the elements of that object. Insertion order is preserved. Duplicate elements are allowed. Every element in the tuple object is represented with index. Tuple supports both forward and backward indexes.

Example –

a=()
print a
print type(a)
b=tuple()
print b
print type(b)
c=(1,2,3)
print c
print type(c)
d=(1,'hello',3.4)
print d
print type(d)
e=('mouse',[8,4,6],[1,2,3])
print e
print type(e)
f=3,4.6,'dog'
x,y,z=f
print x
print type(x)
print y
print type(y)
print z
print type(z)

Output –

()

<type 'tuple'>

()

<type 'tuple'>

(1, 2, 3)

<type 'tuple'>

(1, 'hello', 3.4)

<type 'tuple'>

('mouse', [8, 4, 6], [1, 2, 3])

<type 'tuple'>

3

<type 'int'>

4.6

<type 'float'>

dog

<type 'str'>

Example –

x=tuple('rakeshkumar')
print x
print len(x)
print x[5]
print x[-3]
y=x[2:7]
print y
print type(y)
print x[-7:-2]
del x[-2]

Output –

Traceback (most recent call last):

('r', 'a', 'k', 'e', 's', 'h', 'k', 'u', 'm', 'a', 'r')

  File "C:/Users/om/PycharmProjects/Pythonn/if3.py", line 10, in <module>

11

    del x[-2]

h

TypeError: 'tuple' object doesn't support item deletion

m

('k', 'e', 's', 'h', 'k')

<type 'tuple'>

('s', 'h', 'k', 'u', 'm')

Example –

x=(10,2.,30,10,40,50,10)
print x
for p in x:
    print p
y=(1.1,True,10,'rakesh')
print y
for q in y:
    print q

Output –

(10, 2.0, 30, 10, 40, 50, 10)

10

2.0

30

10

40

50

10

(1.1, True, 10, 'rakesh')

1.1

True

10

rakesh

Example –

x=([10,20,30],(40,50,60),'rakesh')
print x
for p in x:
    print p, type(p), len(p)
    for q in p:
        print q

Output –

([10, 20, 30], (40, 50, 60), 'rakesh')

[10, 20, 30] <type 'list'> 3

10

20

30

(40, 50, 60) <type 'tuple'> 3

40

50

60

rakesh <type 'str'> 6

r

a

k

e

s

h

Example –

x=(10,20,30,40,50,20,10,10)
print x
a=x.count(10)
print a
b=x.index(30)
print b
print 100 in x

Output –

(10, 20, 30, 40, 50, 20, 10, 10)

3

2

False

Example –

x=(10,20,30)
print x
print id(x)
y=(10,40,30)
print y
print id(y)
z=x+y
print z
print id(z)
a=(10,20,30)
print a
print id(a)
b=('rakesh','kumar')*3
print b
print x==a
print x is a

Output –

(10, 20, 30)

18988688

(10, 40, 30)

19535352

(10, 20, 30, 10, 40, 30)

47904280

(10, 20, 30)

47908104

('rakesh', 'kumar', 'rakesh', 'kumar', 'rakesh', 'kumar')

True

False

Note – Tuple comprehension is not supported in python, if we use it 

internally creates generator object

Example –

s=(x**2 for x in range(10))
print s
print type(s)
for p in s:
    print p

Output –

<generator object <genexpr> at 0x029C3288>

<type 'generator'>

0

1

4

9

16

25

36

49

64

81