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Python tuple is an immutable object. Hence any operation that tries to modify it (like append/insert) is not allowed. However, following workaround can be used.First, convert tuple to list by built-in function list(). You can always append as well as insert an item to list object. Then use another built-in function tuple() to convert this list object back to tuple.>>> T1=(10,50,20,9,40,25,60,30,1,56) >>> L1=list(T1) >>> L1 [10, 50, 20, 9, 40, 25, 60, 30, 1, 56] >>> L1.append(100) >>> L1.insert(4,45) >>> T1=tuple(L1) >>> T1 (10, 50, 20, 9, 45, 40, 25, 60, 30, 1, 56, 100)
Slicing operator can be used with any sequence data type, including Tuple. Slicing means separating a part of a sequence, here a tuple. The symbol used for slicing is ‘:’. The operator requires two operands. First operand is the index of starting element of slice, and second is index of last element in slice+1. Resultant slice is also a tuple.>>> T1=(10,50,20,9,40,25,60,30,1,56) >>> T1[2:4] (20, 9)Both operands are optional. If first operand is missing, slice starts from beginning. If second operand is missing, slice goes upto end.>>> T1=(10,50,20,9,40,25,60,30,1,56) >>> T1[6:] (60, 30, 1, 56) >>> T1[:4] (10, 50, 20, 9)
By definition, tuple object is immutable. Hence it is not possible to remove element from it. However, a workaround would be convert tuple to a list, remove desired element from list and convert it back to a tuple.>>> T1=(1,2,3,4) >>> L1=list(T1) >>> L1.pop(0) 1 >>> L1 [2, 3, 4] >>> T1=tuple(L1) >>> T1 (2, 3, 4)
The built-in function tuple() converts a Python string into tuple of individual characters. It also turns a list object into a tuple.>>> tuple("TutorialsPoint") ('T', 'u', 't', 'o', 'r', 'i', 'a', 'l', 's', 'P', 'o', 'i', 'n', 't') >>> L1=[45, 32, 100, 10, 24, 56] >>> tuple(L1) (45, 32, 100, 10, 24, 56)
Position of an element in a list (any sequence data type for that matter) is obtained by index() method. This method finds first instance of occurrence of given element.>>> L1=[45, 32, 100, 10, 24, 56] >>> L1.index(24) 4
Both List and Tuple are called as sequence data types of Python. Objects of both types are comma separated collection of items not necessarily of same type.SimilaritiesConcatenation, repetition, indexing and slicing can be done on objects of both types>>> #list operations >>> L1=[1, 2, 3] >>> L2=[4, 5, 6] >>> #concatenation >>> L3=L1+L2 >>> L3 [1, 2, 3, 4, 5, 6] >>> #repetition >>> L1*3 [1, 2, 3, 1, 2, 3, 1, 2, 3] >>> #indexing >>> L3[4] 5 >>> #slicing >>> L3[2:4] [3, 4]>>> #tuple operations >>> T1=(1, 2, 3) >>> T2=(4, 5, 6) >>> #concatenation >>> T3=T1+T2 >>> ... Read More
Python sequence, including list object allows indexing. Any element in list can be accessed using zero based index. If index is a negative number, count of index starts from end. As we want second to last element in list, use -2 as index.>>> L1=[1,2,3,4,5] >>> print (L1[-2]) 4
The getattr() methodThe getattr() method returns the value of the named attribute of an object. If not found, it returns the default value provided to the function.SyntaxThe syntax of getattr() method is −getattr(object, name[, default])The getattr() method can take multiple parameters −The getattr() method returns −value of the named attribute of the given objectdefault, if no named attribute is foundAttributeError exception, if named attribute is not found and default is not definedThe setattr() methodThe setattr() method sets the value of given attribute of an object.SyntaxThe syntax of setattr() method is −setattr(object, name, value)The setattr() method takes three parameters −The setattr() ... Read More
Python delattr()The delattr() deletes an attribute from the object if the object allows it.SyntaxThe syntax of delattr() is −delattr(object, name)The delattr() method takes two parameters −The delattr() doesn't return any value (returns None). It only removes an attribute (if object allows it).Exampleclass Coordinate: x = 12 y = -7 z = 0 point1 = Coordinate() print('x = ', point1.x) print('y = ', point1.y) print('z = ', point1.z) delattr(Coordinate, 'z') print('--After deleting z attribute--') print('x = ', point1.x) print('y = ', point1.y) # Raises Error ... Read More
The setattr() methodThe setattr() method sets the value of given attribute of an object.SyntaxThe syntax of setattr() method is −setattr(object, name, value)The setattr() method takes three parameters −The setattr() method returns None.Exampleclass Male: name = 'Abel' x = Male() print('Before modification:', x.name) # setting name to 'Jason' setattr(x, 'name', 'Jason') print('After modification:', x.name)OutputThis gives the output('Before modification:', 'Abel') ('After modification:', 'Jason')