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Python – Count frequency of sublist in given list
When it is required to count the frequency of a sub-list in a given list, a list comprehension and the ‘len’ method along with the ‘if’ condition are used.
Example
Below is a demonstration of the same −
my_list = [23, 33, 45, 67, 54 , 43, 33, 45, 67, 83, 33, 45, 67,90, 0]
print("The list is : " )
print(my_list)
sub_list = [33, 45, 67, 90]
print("The sub-list is : " )
print(sub_list)
my_result = len([sub_list for index in range(len(my_list)) if my_list[index : index + len(sub_list)] == sub_list])
print("The resultant list is : ")
print(my_result)Output
The list is : [23, 33, 45, 67, 54, 43, 33, 45, 67, 83, 33, 45, 67, 90, 0] The sub-list is : [33, 45, 67, 90] The resultant list is : 1
Explanation
A list of integers is defined and is displayed on the console.
The sub-list is defined and is displayed on the console.
A list comprehension is used to iterate over the list, and use an ‘if’ condition.
This condition checks if the sum of the length of the sub-list and the specific index and the sublist are equal.
If yes, they are appended to a list, and assigned to a variable.
This is displayed as output on the console.
Updated on: 13-Sep-2021
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