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Python Theory

Tuple:

  • Tuples are very similar to lists,Except that they are immutable(they cannot be changed).
  • They are created using parentheses, rather than square brackets.
    • A tuple can be defined as below:
    Example
    #Different types Of tuples

    tuple = (1,2,3,4,5)
    print(tuple)

    tuple1 = ('Hello',3.5,5)
    print(tuple1)

    tuple1 = ('Apple',[2,4,8],[4,7,9])
    print(tuple2)
    Output
    SkillPundit: Python-List Define

    Tuple indexing and Slicing:

    The indexing and slicing in the tuple are similar to lists.

    pundit
    012345
    -6-5-43-2-1

    Tuple[0]=p Tuple[0:]=('p', 'u', 'n', 'd', 'i', 't')
    Tuple[1]=uTuple[:]=('p', 'u', 'n', 'd', 'i', 't')
    Tuple[2]=nTuple[:4]=('p', 'u', 'n', 'd')
    Tuple[3]=dTuple[2:4]=('n', 'd')
    Tuple[4]=i 
    Tuple[5]=t 

    Two methods are available in Tuple:

    MethodDescription
    count()Returns the count of the number of items passed as an argument.
    index()Returns the index of the first matched item.
    Example
    tuple = ('A','P','P','L','L')

    print(tuple.count('P'))
    print(tuple.index('1'))
    Output
    SkillPundit: Python-List Define

    Advantages of list vs tuple

    ListTuple
    List is a collection of arrays .It is a collection of objects much like a list.
    The list is mutable.The tuple is immutable.
    It represent as []It represent as ()
    The lists are less memory efficient than a tuple.The tuples are more efficient because of its immutability.
    List elements are changeable and ordered.Tuples elements cannot be changed.
    The list has the variable length.Tuple has a fixed length.