如何从文件向字典中插入值

import json

# 读取JSON文件
with open('data.json', 'r') as file:
    data = json.load(file)

# 向字典中插入新的键值对
data['key'] = 'value'

# 将更新后的字典写回文件
with open('data.json', 'w') as file:
    json.dump(data, file)

# 读取文本文件
with open('data.txt', 'r') as file:
    lines = file.readlines()

# 解析文本内容为字典
data = {}
for line in lines:
    key, value = line.strip().split(':')
    data[key] = value

# 向字典中插入新的键值对
data['key'] = 'value'

# 将更新后的字典写回文件
with open('data.txt', 'w') as file:
    for key, value in data.items():
        file.write(f'{key}:{value}\n')

import csv

# 读取CSV文件
with open('data.csv', 'r') as file:
    reader = csv.DictReader(file)
    data = [row for row in reader]

# 向字典中插入新的键值对
new_data = {'key': 'value'}
data.append(new_data)

# 将更新后的字典写回文件
fieldnames = data[0].keys()
with open('data.csv', 'w', newline='') as file:
    writer = csv.DictWriter(file, fieldnames=fieldnames)
    writer.writeheader()
    writer.writerows(data)