使用Python从JSON创建数据结构 [英] Creating a Data Structure from JSON Using Python

问题描述

我是python的新手，我有一个json文件，我正在尝试使用它创建使用python的数据结构.

I'm new to python and I have a json file that I'm trying to use to create a data structure using python.

以下是其中一行内容的示例:

Here is a sample of what one of the lines would look like:

[{'name': 'Nick', 'age': '35', 'city': 'New York'}...]

我将其读入内存，但不确定要使用它来创建表还需要执行哪些其他步骤.

I read it into memory, but am unsure what additional steps I would need to take to use it to create a table.

这是我到目前为止尝试过的:

Here is what I have tried so far:

import json
import csv
from pprint import pprint

with open("/desktop/customer_records.json") as customer_records:
    data=json.load(customer_records)
    for row in data:
        print(row)

理想情况下，我会采用以下格式:

Ideally, I would it in the following format:

Name Age City
Nick 35  New York

任何帮助将不胜感激.预先感谢.

Any help would be appreciated. Thanks in advance.

推荐答案

您的问题并未得到精确指定，但是如果您要生成可插入MySQL的SQL，则可以使用以下小程序将JSON转换为SQL语句:

Your problem is not specified too precisely, but if you want to generate SQL that can be inserted into MySQL, here's a little program that converts JSON to a sequence of SQL statements:

#!/usr/bin/env python

import json

# Load data
with open("zz.json") as f:
    data=json.load(f)

# Find all keys
keys = []
for row in data:
    for key in row.keys():
        if key not in keys:
            keys.append(key)

# Print table definition
print """CREATE TABLE MY_TABLE(
  {0}
);""".format(",\n  ".join(map(lambda key: "{0} VARCHAR".format(key), keys)))

# Now, for all rows, print values
for row in data:
    print """INSERT INTO MY_TABLE VALUES({0});""".format(
        ",".join(map(lambda key: "'{0}'".format(row[key]) if key in row else "NULL", keys)))

对于此JSON文件:

[
  {"name": "Nick", "age": "35", "city": "New York"},
  {"name": "Joe", "age": "21", "city": "Boston"},
  {"name": "Alice", "city": "Washington"},
  {"name": "Bob", "age": "49"}
]

它生成

CREATE TABLE MY_TABLE(
  city VARCHAR,
  age VARCHAR,
  name VARCHAR
);
INSERT INTO MY_TABLE VALUES('New York','35','Nick');
INSERT INTO MY_TABLE VALUES('Boston','21','Joe');
INSERT INTO MY_TABLE VALUES('Washington',NULL,'Alice');
INSERT INTO MY_TABLE VALUES(NULL,'49','Bob');

为了将来，请让您的问题更具体:)

And for the future, please make your question WAY more specific :)

这篇关于使用Python从JSON创建数据结构的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！