json.loads()：解析一个有效的JSON字符串并将其转换为Python字典
json.load()：从一个文件读取JSON类型的数据，然后转转换成Python字典
1、例子
import json
data = {
"name": "Satyam kumar",
"place": "patna",
"skills": [
"Raspberry pi",
"Machine Learning",
"Web Development"
],
"email": "xyz@gmail.com",
"projects": [
"Python Data Mining",
"Python Data Science"
]
}
with open("data_file.json", "w") as write:
json.dump(data, write)
with open("data_file.json", "r") as read_content:
print(json.load(read_content))
2、Python和Json数据类型的映射
| JSON Equivalent | Python |
|---|---|
| object | dict |
| array | list |
| string | str |
| number | int |
| true | True |
| false | False |
| null | None |
import json
# JSON string:
# Multi-line string
data = """{
"Name": "Jennifer Smith",
"Contact Number": 7867567898,
"Email": "jen123@gmail.com",
"Hobbies":["Reading", "Sketching", "Horse Riding"]
}"""
# parse data:
res = json.loads(data)
# the result is a Python dictionary:
print(res)
json.dumps 用于将 Python 对象编码成 JSON 字符串。
json.dumps(obj, skipkeys=False, ensure_ascii=True, check_circular=True, allow_nan=True, cls=None, indent=None, separators=None, encoding="utf-8", default=None, sort_keys=False, **kw)
以下实例将数组编码为 JSON 格式数据：
#!/usr/bin/python
import json
data = [ { 'a' : 1, 'b' : 2, 'c' : 3, 'd' : 4, 'e' : 5 } ]
data2 = json.dumps(data)
print(data2)
以上代码执行结果为：
[{"a": 1, "c": 3, "b": 2, "e": 5, "d": 4}]
使用参数让 JSON 数据格式化输出：
#!/usr/bin/python
import json
data = [ { 'a' : 1, 'b' : 2, 'c' : 3, 'd' : 4, 'e' : 5 } ]
data2 = json.dumps({'a': 'Runoob', 'b': 7}, sort_keys=True, indent=4, separators=(',', ': '))
print(data2)
以上代码执行结果为：
{
"a": "Runoob",
"b": 7
}
