Python: Count the frequency of the elements of a given unordered list
32. Frequency of Unordered List
Write a Python program to count the frequency of the elements of a given unordered list.
Sample Solution:
Python Code:
from itertools import groupby
uno_list = [2,1,3,8,5,1,4,2,3,4,0,8,2,0,8,4,2,3,4,2]
print("Original list:")
print(uno_list)
uno_list.sort()
print(uno_list)
print("\nSort the said unordered list:")
print(uno_list)
print("\nFrequency of the elements of the said unordered list:")
result = [len(list(group)) for key, group in groupby(uno_list)]
print(result)
Sample Output:
Original list: [2, 1, 3, 8, 5, 1, 4, 2, 3, 4, 0, 8, 2, 0, 8, 4, 2, 3, 4, 2] [0, 0, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 4, 4, 4, 4, 5, 8, 8, 8] Sort the said unordered list: [0, 0, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 4, 4, 4, 4, 5, 8, 8, 8] Frequency of the elements of the said unordered list: [2, 2, 5, 3, 4, 1, 3]
For more Practice: Solve these Related Problems:
- Write a Python program to count the frequency of each element in an unordered list using a dictionary comprehension and itertools.
- Write a Python program to use itertools.groupby on a sorted version of an unordered list and return a frequency distribution.
- Write a Python program to map a function that counts occurrences of each unique element in an unordered list and outputs a sorted frequency list.
- Write a Python program to compute the frequency of elements in an unordered list and then filter out those with frequency below a given threshold.
Python Code Editor:
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