Python 读取 JSON 值的方法

程序语言 Python
1

python json read value

如果 Python 使用的嵌套方式进行读取的话，可以使用下面的方法进行读取：

json_string = '{"person": {"name": "Alice", "address": {"street": "Main St"}}}'
data = json.loads(json_string)

print(data["person"]["address"]["street"])
2

To read a value from a JSON object in Python, you can use the json library to parse JSON data and access its values using standard Python dictionary operations. Below is an example of how you can do this:

import json

# Sample JSON data as a string
json_data = '{"name": "John Doe", "age": 30, "city": "New York"}'

# Parse the JSON data
data = json.loads(json_data)

# Access values
name = data['name']
age = data['age']
city = data['city']

print(f'Name: {name}')
print(f'Age: {age}')
print(f'City: {city}')

Here’s a step-by-step explanation:

  1. Import the json Library: This library provides functionalities to work with JSON data.
  2. Parse JSON Data: Use json.loads() to convert a JSON-formatted string into a Python dictionary.
  3. Access Dictionary Values: Once you have the JSON data in a dictionary, you can access values using keys, just like any other Python dictionary.

If you are dealing with a JSON file, you can read the file first and then parse the JSON:

import json

# Assume we have a file named 'data.json'
with open('data.json', 'r') as file:
    data = json.load(file)  # This automatically parses the JSON
    
# Access values
name = data['name']
age = data['age']
city = data['city']

print(f'Name: {name}')
print(f'Age: {age}')
print(f'City: {city}')

In this case, json.load() directly reads and parses the JSON data from a file.

1 Like
4

json.load() 的这个方法可以读取文件，也可以读取字符串。

通常这是对 Json 数据处理的第一步。