Advertisements
Advertisements
Question
Differentiate between append() and extend() functions of list.
Solution
The append() function takes a single element as an argument and appends it to the list. The argument can be any datatype, even a list. The argument will be added as a single element.
>>>list1 = [10, 20, 30]
>>>list1.append(40)list1 will now be [10, 20, 30, 40].
>>>list1 = [10, 20, 30]
>>>list1.append([40, 50])Here [40, 50] is a list that will be considered as a single argument, and will be added to the list at index 3. 'list1' will now be [10, 20, 30, [40, 50]].
The extend() function takes any iterable data type (e.g. list, tuple, string, dictionary) as an argument and adds all the elements of the list passed as an argument to the end of the given list. This function can be used to add more than one element in the list in a single statement.
>>> list1 = [2, 4, 5, 6]
>>> list1.extend((2, 3, 4, 5))
>>> print(list1)
OUTPUT:
[2, 4, 5, 6, 2, 3, 4, 5]APPEARS IN
RELATED QUESTIONS
Consider the following list myList. What will be the elements of myList after the following operation:
myList = [10,20,30,40]
myList.append([50,60])Consider the following list myList. What will be the elements of myList after the following operation:
myList = [10,20,30,40]
myList.extend([80,90])What will be the output of the following code segment:
myList = [1,2,3,4,5,6,7,8,9,10]
for i in range(0,len(myList)):
if i%2 == 0:
print(myList[i])Write a function that returns the largest element of the list passed as a parameter.
Write a function to return the second largest number from a list of numbers.
Write a program to read a list of n integers and find their median.
Note: The median value of a list of values is the middle one when they are arranged in order. If there are two middle values then take their average.
Hint: You can use a built-in function to sort the list.
Write a program to read a list of elements. Input an element from the user that has to be inserted in the list. Also, input the position at which it is to be inserted. Write a user-defined function to insert the element at the desired position in the list.
Read a list of n elements. Pass this list to a function that reverses this list in place without creating a new list.
