JSON 文件：使用 Python 对不同对象进行单独的字数统计

Question

对于当前的一个研究项目，我计划计算 JSON 文件中不同对象的唯一词。理想情况下，输出文件应为"Text Main"、"Text Pro" 和"Text Con" 中的文本显示单独的字数统计摘要（计算唯一单词的出现）。是否有任何巧妙的调整来实现这一点？

目前，我收到以下错误消息：

File "index.py", line 10, in <module>
text = data["Text_Main"]
TypeError: list indices must be integers or slices, not str

JSON 文件具有以下结构：

[
{"Stock Symbol":"A",
"Date":"05/11/2017",
"Text Main":"Text sample 1",
"Text Pro":"Text sample 2",
"Text Con":"Text sample 3"}
]

而对应的代码如下：

# Import relevant libraries
import string
import json
import csv
import textblob

# Open JSON file and slice by object
file = open("Glassdoor_A.json", "r")
data = json.load(file)
text = data["Text_Main"]

# Create an empty dictionary
d = dict()

# Loop through each line of the file
for line in text:
    # Remove the leading spaces and newline character
    line = line.strip()

    # Convert the characters in line to
    # lowercase to avoid case mismatch
    line = line.lower()

    # Remove the punctuation marks from the line
    line = line.translate(line.maketrans("", "", string.punctuation))

    # Split the line into words
    words = line.split(" ")

    # Iterate over each word in line
    for word in words:
        # Check if the word is already in dictionary
        if word in d:
            # Increment count of word by 1
            d[word] = d[word] + 1
        else:
            # Add the word to dictionary with count 1
            d[word] = 1

# Print the contents of dictionary
for key in list(d.keys()):
    print(key, ":", d[key])

# Save results as CSV
with open('Glassdoor_A.csv', 'w', newline='') as file:
    writer = csv.writer(file)
    writer.writerow(["Word", "Occurences", "Percentage"])
    writer.writerows([key, d[key])

Answer 1

首先，密钥应该是"Text Main"，其次您需要访问list 中的第一个dict。所以只需像这样提取text 变量：

text = data[0]["Text Main"]

这应该可以修复错误消息。

Answer 2

您的 JSON 文件在列表中有一个对象。为了访问您想要的内容，首先您必须通过data[0] 访问该对象。然后您可以访问字符串字段。我会将代码更改为：

# Open JSON file and slice by object
file = open("Glassdoor_A.json", "r")
data = json.load(file)
json_obj = data[0]
text = json_obj["Text_Main"]

或者您可以使用 text = data[0]["Text_Main"] 在一行中访问该字段，如 quamrana 所述。