Tuple In Python

 

Tuple

• Tuple is an ordered collection, mostly preferred for heterogeneous type of data collection, but can be used for homogeneous data.

 #program

 t1 = ("Techno Xpresss", 28, 80.72)      # heterogeneous data
 t2 = (10, 20, 30)                       # homogeneous type of data

 print("t1 : ", t1)
 print("t1 : ", t2)
 print("type(t1)", type(t1))
 print("type(t2)", type(t2))

 #output
 t1 :  ('Techno Xpresss', 28, 80.72)
 t1 :  (10, 20, 30)
 type(t1) <class 'tuple'>
 type(t2) <class 'tuple'>

• To define a tuple, we use ( ) (round brackets), each member is separated by ','

                    Syntax :
                                Tuple_name = (member1, member2,..)

 #program

 t1 = ("Techno Xpresss", 28, 80.72)
 print("t1       : ", t1)
 print("type(t1) : ", type(t1))

 #output
 t1       :  ('Techno Xpresss', 28, 80.72)
 type(t1) :  <class 'tuple'>

• Tuple can be defined as Empty Tuple.

#program

t1 = ("Techno Xpresss", 28, 80.72)
t2 = ()                       # empty tuple

print("t1 : ", t1)
print("t1 : ", t2)
print("type(t1)", type(t1))
print("type(t2)", type(t2))

#output

t1 :  ('Techno Xpresss', 28, 80.72)
t1 :  ()
type(t1) <class 'tuple'>
type(t2) <class 'tuple'>

• Tuple with single element can also be defined
• but need to add ',' with single member,
• if ',' missed, it will take as the type of data, either int, float or str.

 #program

 t1 = ("Techno Xpresss", 28, 80.72)
 t2 = ("Techno Xpresss")
 t3 = (10)
 t4 = (80.72)

 t5 = ("Techno Xpresss",)
 t6 = (10,)
 t7 = (80.72,)

 print("t1 : ", t1)
 print("type(t1)", type(t1))

 print("t2 : ", t2)
 print("type(t2)", type(t2))

 print("t3 : ", t3)
 print("type(t3)", type(t3))

 print("t4 : ", t4)
 print("type(t4)", type(t4))

 print("t5 : ", t5)
 print("type(t5)", type(t5))

 print("t6 : ", t6)
 print("type(t6)", type(t6))

 print("t7 : ", t7)
 print("type(t7)", type(t7))


 #output

 t1 :  ('Techno Xpresss', 28, 80.72)
 type(t1) <class 'tuple'>
 t2 :  Techno Xpresss
 type(t2) <class 'str'>
 t3 :  10
 type(t3) <class 'int'>
 t4 :  80.72
 type(t4) <class 'float'>
 t5 :  ('Techno Xpresss',)
 type(t5) <class 'tuple'>
 t6 :  (10,)
 type(t6) <class 'tuple'>
 t7 :  (80.72,)
 type(t7) <class 'tuple'>

• To access individual element of Tuple, indexing is used.

 #program

 t1 = ("Techno Xpresss", 28, 80.72)
 print("t1    : ", t1)
 print("t1[0] :", t1[0])


 #output

 t1    :  ('Techno Xpresss', 28, 80.72)
 t1[0] : Techno Xpresss

• Tuple allows Positive and negative indexing.

 #program

 t1 = ("Techno Xpresss", 28, 80.72)
 print("t1     : ", t1)
 print("t1[0]  :", t1[0])
 print("t1[-3] :", t1[-3])
 print("t1[2]  :", t1[2])
 print("t1[-1] :", t1[-1])


 #output

 t1     :  ('Techno Xpresss', 28, 80.72)
 t1[0]  : Techno Xpresss
 t1[-3] : Techno Xpresss
 t1[2]  : 80.72
 t1[-1] : 80.72

• Tuple allows multiplication and addition operations.

 #program

 t1 = ("Techno Xpresss",)
 t2 = (28, 80.72)
 print("t1      : ", t1)
 print("t2      : ", t2)

 print("t1 + t2 : ", t1+t2)
 print("t1 * 2  ; ", t1*2)
 print("t2 * 3  ; ", t2*3)

 #output

 t1      :  ('Techno Xpresss',)
 t2      :  (28, 80.72)
 t1 + t2 :  ('Techno Xpresss', 28, 80.72)
 t1 * 2  ;  ('Techno Xpresss', 'Techno Xpresss')
 t2 * 3  ;  (28, 80.72, 28, 80.72, 28, 80.72)

adding 2 Tuple, will cascade 2nd Tuple in 1st Tuple.

multiplying Tuple with any number n, resulted Tuple will have original Tuple data n times.

• Limitation:
• we can not add any data to Tuple via addition

 #program

 t1 = ("Techno Xpresss",20)

 print("t1 : ", t1)
 t2 = t1 + 80.72


 #output

 t1 :  ('Techno Xpresss', 20)
 Traceback (most recent call last):
   File "C:/Self_Practice_Er_M_S_Dandyan/Python/Pycharm/xml/main.py", line 5, in <module>
     t2 = t1 + 80.72
 TypeError: can only concatenate tuple (not "float") to tuple

• we can not multiply 2 Tuple with each other

 #program

 t1 = ("Techno Xpresss",)
 t2 = (28, 80.72)
 print("t1 : ", t1)
 print("t2 : ", t2)
 print("t1 * t2", t1*t2)


 #output

 t1 :  ('Techno Xpresss',)
 t2 :  (28, 80.72)
 Traceback (most recent call last):
   File "C:/Self_Practice_Er_M_S_Dandyan/Python/Pycharm/xml/main.py", line 7, in <module>
     print("t1 * t2", t1*t2)
 TypeError: can't multiply sequence by non-int of type 'tuple'

• Element values in Tuple can repeat

 #program

 t1 = ("Techno Xpresss",28, 80.72, "Techno Xpresss", 80.72)
 print("t1 : ", t1)


 #output
 t1 :  ('Techno Xpresss', 28, 80.72, 'Techno Xpresss', 80.72)

• Tuple are immutable, means we can modify members value

 #program

 t1 = ("Techno Xpresss",28, 80.72, "Techno Xpresss", 80.72)
 print("t1 : ", t1)
 t1[3] = "Er M S Dandyan"
 print("t1 : ", t1)


 #output
 t1 :  ('Techno Xpresss', 28, 80.72, 'Techno Xpresss', 80.72)
 Traceback (most recent call last):
   File "C:/Self_Practice_Er_M_S_Dandyan/Python/Pycharm/xml/main.py", line 5, in <module>
     t1[3] = "Er M S Dandyan"
 TypeError: 'tuple' object does not support item assignment

Tuple have few Tuple class Built in Methods