用熊猫（python）计算数据框中的标记词

Question

我在 Python 的数据框中创建了一个标记化的数据（文本）

我只想计算标记化数据，并有一个输出显示标记化数据中每个元素的重复频率。

这是我用来创建标记化数据的代码：

import numpy as np
import pandas as pd 
import matplotlib.pyplot as plt
import re

def tokenize(txt):
    tokens = re.split('\W+', txt)
    return tokens

Complains['clean_text_tokenized'] = Complains['clean text'].apply(lambda x: tokenize(x.lower()))

# Complains['clean text'] is the original file of the data


Complains['clean_text_tokenized'].head(10)

这是标记化数据的输出

0                   [comcast, cable, internet, speeds]
1     [payment, disappear, service, got, disconnected]
2                                [speed, and, service]
3    [comcast, imposed, a, new, usage, cap, of, 300...
4    [comcast, not, working, and, no, service, to, ...
5    [isp, charging, for, arbitrary, data, limits, ...
6    [throttling, service, and, unreasonable, data,...
7    [comcast, refuses, to, help, troubleshoot, and...
8                         [comcast, extended, outages]
9    [comcast, raising, prices, and, not, being, av...
Name: clean_text_tokenized, dtype: object

任何建议都会有所帮助

Answer 1

你可以使用Counter:

from collections import Counter
# ... and then
def tokenize(txt):
    return Counter(re.split('\W+', txt))

查看 Python 测试：

from collections import Counter
import pandas as pd
import re

Complains = pd.DataFrame({'clean text':['comcast, cable, internet, speeds', 'payment, disappear, service, got, disconnected']})

Complains['clean_text_tokenized'] = Complains['clean text'].str.findall(r'\w+')

freq = Counter([item for sublist in Complains['clean_text_tokenized'].to_list() for item in sublist])