列表列表中元素的频率

Question

我的目标是计算列表中单词的频率。所以，我有：

list_1 = [['x', 'y', 'z'], ['x', 'y', 'w'], ['w', 'x', 'y']]

我的目标是这样的：

x:3, y:3, w:2, z:1

Answer 1

您可以使用 Counter:

>>> from collections import Counter
>>> Counter(elem for sub in list_1 for elem in sub)
Counter({'x': 3, 'y': 3, 'w': 2, 'z': 1})

Answer 2

你可以这样做：

list_1 = [['x', 'y', 'z'], ['x', 'y', 'w'], ['w', 'x', 'y']]

freq = {}

for i in list_1:
    for j in i:
        try:
            freq[j] += 1
        except KeyError:
            freq[j] = 1
        
print(freq)

列表列表中元素的频率

Frequency of elements in a list of list

python

list

word-frequency