Python - Tuples

Python tuple is another sequence data type that is similar to the list. A tuple consists of a number of values separated by commas. Unlike lists, however, tuples are enclosed within parenthesis. Tuples can be thought of as read-only lists.

Example 1: use of Tuples

tuple = ( 'abcd', 786 , 2.23, 'john', 70.2  )
tinytuple = (123, 'john')

print (tuple)           # Prints complete tuple
print (tuple[0])        # Prints first element of the tuple
print (tuple[1:3])      # Prints elements starting from 2nd till 3rd 
print (tuple[2:])       # Prints elements starting from 3rd element
print (tinytuple * 2)   # Prints tuple two times
print (tuple + tinytuple) # Prints concatenated tuple

('abcd', 786, 2.23, 'john', 70.200000000000003)
abcd
(786, 2.23)
(2.23, 'john', 70.200000000000003)
(123, 'john', 123, 'john')
('abcd', 786, 2.23, 'john', 70.200000000000003, 123, 'john')

The main difference between lists and tuples are −

Example 2: Difference between list and tuple

tuple = ( 'abcd', 786 , 2.23, 'john', 70.2  )
list = [ 'abcd', 786 , 2.23, 'john', 70.2  ]
tuple[2] = 1000    # Invalid syntax with tuple
list[2] = 1000     # Valid syntax with list

Python tuple is an immutable object. Hence any operation that tries to modify it (like append, remove) is not allowed.

However, you can perform modify a tuple with the help of list. First, convert tuple to list, append/remove item to list object, then convert the list back to tuple.

Example 3: Method 1 - Convert tuple into list using list constructor

t = ( 'java', 5 , 'python', 'django' )
l=list(t)
l.append('HTML')
t=tuple(l)
print(t)

Example 4: Method 2 - Convert tuple into list using unpacking

t = ( 'java', 5 , 'python', 'django' )
l=[*t]
l.append('HTML')
t=tuple(l)
print(t)

Example 5: Method 3 - Convert tuple into list using unpacking

t = ( 'java', 5 , 'python', 'django' )
l=[]
for x in t:
    l.append(x)
l.append('HTML')
t=tuple(l)
print(t)