demo01代码

d={
        "error_code": 0,
        "stu_info": [
                {
                        "id": 2059,
                        "name": "小白",
                        "sex": "男",
                        "age": 28,
                        "addr": "河南省济源市北海大道32号",
                        "grade": "天蝎座",
                        "phone": "18378309272",
                        "gold": 10896,
                        "info":{
                            "card":434345432,
                            "bank_name":'中国银行'
                        }

                },
                {
                        "id": 2067,
                        "name": "小黑",
                        "sex": "男",
                        "age": 28,
                        "addr": "河南省济源市北海大道32号",
                        "grade": "天蝎座",
                        "phone": "12345678915",
                        "gold": 100
                }
        ]
}

res= d["stu_info"][1]['name'] #取某个学生姓名的原始方法:通过查找字典中的key以及list方法中的下标索引
print(res) #输出结果是：小黑

import jsonpath
res1=jsonpath.jsonpath(d,'$..name') #嵌套n层也能取到所有学生姓名信息,$表示最外层的{}，..表示模糊匹配
print(res1) #输出结果是list：['小白', '小黑']

res2= jsonpath.jsonpath(d,'$..bank_name')
print(res2) #输出结果是list：['中国银行']

res3=jsonpath.jsonpath(d,'$..name123') #当传入不存在的key(name)时,返回False
print(res3) #输出结果是：False

demo02代码

# -*- coding:utf-8 -*-
# @Time: 2020/5/10 20:53
# @Author: xinggevip
# @Email: 1511844263@qq.com
# @File: demo02.py

import requests
from lxml import etree

response = requests.get('https://www.baidu.com')

response.encoding = 'utf-8'

selector = etree.HTML(response.text)
news_text = selector.xpath('//*[@id="u1"]/a/text()')
news_url = selector.xpath('//*[@id="u1"]/a/@href')
links = []

length = len(news_text)
for i in range(length):
    link = {
        "new_text":news_text[i],
        "new_url":news_url[i]
    }
    links.append(link)
for val in links:
    print(val)

print('------第二种写法----------')

list = []
for text,url in zip(news_text,news_url):
    item = {
        "title":text,
        "url":url
    }
    list.append(item)
for item in list:
    print(item)