Tuples In Python

A Tuple is a collection of Python objects separated by commas. In someways a tuple is similar to a list in terms of indexing, nested objects and repetition but a tuple is immutable unlike lists which are mutable.

Creating Tuples

# An empty tuple 
empty_tuple = () 
print (empty_tuple)

Output:

()

# Creating non-empty tuples 
  
# One way of creation 
tup = 'python', 'easy'
print(tup) 
  
# Another for doing the same 
tup = ('python', 'easy') 
print(tup)

Output

('python', 'easy')
('python', 'easy')

Note:

In case your generating a tuple with a single element, make sure to add a comma after the element.

Concatenation of Tuples

# Code for concatenating 2 tuples 
  
tuple1 = (0, 1, 2, 3) 
tuple2 = ('python', 'easy') 
  
# Concatenating above two 
print(tuple1 + tuple2)

Output:

(0, 1, 2, 3, 'python', 'easy')

Nesting of Tuples

# Code for creating nested tuples 
  
tuple1 = (0, 1, 2, 3) 
tuple2 = ('python', 'easy') 
tuple3 = (tuple1, tuple2) 
print(tuple3)

Output :

((0, 1, 2, 3), ('python', 'easy'))

Repetition in Tuples

# Code to create a tuple with repetition 
  
tuple3 = ('python',)*3
print(tuple3)

Output

('python', 'python', 'python')
Try the above without a comma 
sand check. You will get tuple3 as a string ‘pythonpythonpython’.

Immutable Tuples

#code to test that tuples are immutable 
  
tuple1 = (0, 1, 2, 3) 
tuple1[0] = 4
print(tuple1)

Output

Traceback (most recent call last):
  File "e0eaddff843a8695575daec34506f126.py", line 3, in
    tuple1[0]=4
TypeError: 'tuple' object does not support item assignment

Slicing in Tuples

# code to test slicing 
  
tuple1 = (0 ,1, 2, 3) 
print(tuple1[1:]) 
print(tuple1[::-1]) 
print(tuple1[2:4])

Output

(1, 2, 3)
(3, 2, 1, 0)
(2, 3)

Deleting a Tuple

# Code for deleting a tuple 
  
tuple3 = ( 0, 1) 
del tuple3 
print(tuple3)

Error:

Traceback (most recent call last):
  File "d92694727db1dc9118a5250bf04dafbd.py", line 6, in <module>
    print(tuple3)
NameError: name 'tuple3' is not defined

Output:

(0, 1)

Finding Length of a Tuple

# Code for printing the length of a tuple 
  
tuple2 = ('python', 'easy') 
print(len(tuple2))

Output

Converting list to a Tuple

# Code for converting a list and a string into a tuple 
  
list1 = [0, 1, 2] 
print(tuple(list1)) 
print(tuple('python')) # string 'python'

Output

(0, 1, 2)
('p', 'y', 't', 'h', 'o', 'n')

Takes a single parameter which may be a list,string,set or even a dictionary( only keys are taken as elements) and converts them to a tuple.

Tuples in a loop

#python code for creating tuples in a loop 
  
tup = ('easy',) 
n = 5  #Number of time loop runs 
for i in range(int(n)): 
    tup = (tup,) 
    print(tup)

Output :

(('easy',),)
((('easy',),),)
(((('easy',),),),)
((((('easy',),),),),)
(((((('easy',),),),),),)

Using cmp(), max() , min()

# A python program to demonstrate the use of  
# cmp(), max(), min() 
  
tuple1 = ('python', 'easy') 
tuple2 = ('coder', 1) 
  
if (cmp(tuple1, tuple2) != 0): 
  
    # cmp() returns 0 if matched, 1 when not tuple1  
    # is longer and -1 when tuple1 is shoter 
    print('Not the same') 
else: 
    print('Same') 
print ('Maximum element in tuples 1,2: ' + 
        str(max(tuple1)) +  ',' + 
        str(max(tuple2))) 
print ('Minimum element in tuples 1,2: ' + 
     str(min(tuple1)) + ','  + str(min(tuple2)))

Output

Not the same
Maximum element in tuples 1,2: python,coder
Minimum element in tuples 1,2: easy,1

Note:

max() and min() checks the based on ASCII values. If there are two strings in a tuple, then the first different character in the strings are checked.

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