There are many ways of clearing the list through methods of different constructs offered by Python language. Let’s try to understand each of the method one by one.

• Method #1 : Using clear() method
  # Python program to clear a list # using clear() method # list of letters  GEEK = [6, 0, 4, 1] print('before clear:', GEEK)    # clearing vowels  GEEK.clear()  print(' after clear:', GEEK)

  Output:

  python before clear: [6, 0, 4, 1]
  python after clear: []

   

• Method #2 : Reinitializing the list : The initialization of the list in that scope, initializes the list with no value. i.e list of size 0. Let’s see the example demonstrating Method 1 and 2 to clear list
  # Python3 code to demonstrate  # clearing a list using # clear and Reinitializing    # Initializing lists list1 = [1, 2, 3] list2 = [5, 6, 7]   # Printing list1 before deleting  print ("List1 before deleting is : " +  str(list1))   # deleting list using clear() list1.clear()   # Printing list1 after clearing print ("List1 after clearing using clear() : " + str(list1))   # Printing list2 before deleting  print ("List2 before deleting is : "  +  str(list2))   # deleting list using reinitialization list2 = []   # Printing list2 after reinitialization print ("List2 after clearing using reinitialization : " + str(list2))

  Output:

   

  List1 before deleting is : [1, 2, 3]
  List1 after clearing using clear() : []
  List2 before deleting is : [5, 6, 7]
  List2 after clearing using reinitialization : []
  

   

• Method #3 : Using “*= 0” : This is a lesser known method, but this method removes all elements of the list and makes it empty.
  # Python3 code to demonstrate  # clearing a list using # *= 0 method # Initializing lists list1 = [1, 2, 3]   # Printing list1 before deleting  print ("List1 before deleting is : " + str(list1))   # deleting list using *= 0 list1 *= 0   # Printing list1 after *= 0 print ("List1 after clearing using *= 0: " + str(list1))

  Output:

  List1 before deleting is : [1, 2, 3]
  List1 after clearing using *= 0: []

   

• Method #4 : Using del : del can be used to clear the list elements in a range, if we don’t give a range, all the elements are deleted.
   

  # Python3 code to demonstrate  # clearing a list using # del method   # Initializing lists list1 = [1, 2, 3] list2 = [5, 6, 7]   # Printing list1 before deleting  print ("List1 before deleting is : " + str(list1))   # deleting list1 using del del list1[:] print ("List1 after clearing using del : " + str(list1))     # Printing list2 before deleting  print ("List2 before deleting is : " + str(list2))   # deleting list using del del list2[:] print ("List2 after clearing using del : " + str(list2))

  Output:

  List1 before deleting is : [1, 2, 3]
  List1 after clearing using del : []
  List2 before deleting is : [5, 6, 7]
  List2 after clearing using del : []