Python教程栏目介绍爬取Json数据实例

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本文中以爬取其中的AI流转率数据为例。

该地址返回的响应内容为Json类型，其中红框标记的项即为AI流转率值：

实现代码如下：import requests

import json

import csv

# 爬虫地址

url = 'https://databank.yushanfang.com/api/ecapi?path=/databank/crowdFullLink/flowInfo&fromCrowdId=3312&beginTheDate=201810{}&endTheDate=201810{}&toCrowdIdList[0]=3312&toCrowdIdList[1]=3313&toCrowdIdList[2]=3314&toCrowdIdList[3]=3315'

# 携带cookie进行访问

headers = {

'Host':'databank.yushanfang.com',

'Referer':'https://databank.yushanfang.com/',

'Connection':'keep-alive',

'User-Agent':'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.84 Safari/537.36',

'Cookie':'_tb_token_=iNkDeJLdM3MgvKjhsfdW; bs_n_lang=zh_CN; cna=aaj1EViI7x0CATo9kTKvjzgS; ck2=072de851f1c02d5c7bac555f64c5c66d; c_token=c74594b486f8de731e2608cb9526a3f2; an=5YWo5qOJ5pe25Luj5a6Y5pa55peX6Iiw5bqXOnpmeA%3D%3D; lg=true; sg=\"=19\"; lvc=sAhojs49PcqHQQ%3D%3D; isg=BPT0Md7dE_ic5Ie3Oa85RxaMxbLK3UqJMMiN6o5VjH8C-ZRDtt7aRXb3fXGEAVAP',

}

rows = []

for n in range(20, 31):

row = []

row.append(n)

for m in range (21, 32):

if m < n + 1:

row.append("")

else:

# 格式化请求地址，更换请求参数

reqUrl = url.format(n, m)

# 打印本次请求地址

print(url)

# 发送请求，获取响应结果

response = requests.get(url=reqUrl, headers=headers, verify=False)

text = response.text

# 打印本次请求响应内容

print(text)

# 将响应内容转换为Json对象

jsonobj = json.loads(text)

# 从Json对象获取想要的内容

toCntPercent = jsonobj['data']['interCrowdInfo'][1]['toCntPercent']

# 生成行数据

row.append(str(toCntPercent)+"%")

# 保存行数据

rows.append(row)

# 生成Excel表头

header = ['AI流转率', '21', '22', '23', '24', '25', '26', '27', '28', '29', '30', '31']

# 将表头数据和爬虫数据导出到Excel文件

with open('D:\\res\\pachong\\tmall.csv', 'w', encoding='gb18030') as f :

f_csv = csv.writer(f)

f_csv.writerow(header)

f_csv.writerows(rows)import csv

import json

import ssl

import urllib.request

# 爬虫地址

url = 'https://databank.yushanfang.com/api/ecapi?path=/databank/crowdFullLink/flowInfo&fromCrowdId=3312&beginTheDate=201810{}&endTheDate=201810{}&toCrowdIdList[0]=3312&toCrowdIdList[1]=3313&toCrowdIdList[2]=3314&toCrowdIdList[3]=3315'

# 不校验证书

ssl._create_default_https_context = ssl._create_unverified_context

# 携带cookie进行访问

headers = {

'Host':'databank.yushanfang.com',

'Referer':'https://databank.yushanfang.com/',

'Connection':'keep-alive',

'User-Agent':'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.84 Safari/537.36',

'Cookie':'_tb_token_=iNkDeJLdM3MgvKjhsfdW; bs_n_lang=zh_CN; cna=aaj1EViI7x0CATo9kTKvjzgS; ck2=072de851f1c02d5c7bac555f64c5c66d; c_token=c74594b486f8de731e2608cb9526a3f2; an=5YWo5qOJ5pe25Luj5a6Y5pa55peX6Iiw5bqXOnpmeA%3D%3D; lg=true; sg=\"=19\"; lvc=sAhojs49PcqHQQ%3D%3D; isg=BPT0Md7dE_ic5Ie3Oa85RxaMxbLK3UqJMMiN6o5VjH8C-ZRDtt7aRXb3fXGEAVAP',

}

rows = []

n = 20

while n <31:

row = []

row.append(n)

m =21

while m <32:

if m < n + 1:

row.append("")

else:

# 格式化请求地址，更换请求参数

reqUrl = url.format(n, m)

# 打印本次请求地址

print(reqUrl)

# 发送请求，获取响应结果

request = urllib.request.Request(url=reqUrl, headers=headers)

response = urllib.request.urlopen(request)

text = response.read().decode('utf8')

# 打印本次请求响应内容

print(text)

# 将响应内容转换为Json对象

jsonobj = json.loads(text)

# 从Json对象获取想要的内容

toCntPercent = jsonobj['data']['interCrowdInfo'][1]['toCntPercent']

# 生成行数据

row.append(str(toCntPercent) + "%")

m = m+1

rows.append(row)

n = n+1

# 生成Excel表头

header = ['AI流转率', '21', '22', '23', '24', '25', '26', '27', '28', '29', '30', '31']

# 将表头数据和爬虫数据导出到Excel文件

with open('D:\\res\\pachong\\tmall.csv', 'w', encoding='gb18030') as f :

f_csv = csv.writer(f)

f_csv.writerow(header)

f_csv.writerows(rows)

导出内容如下：

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