Python爬取Json数据的示例

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 requestsimport jsonimport 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 csvimport jsonimport sslimport 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 = 20while 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：

到此这篇关于使用Python爬取Json数据的文章就介绍到这了。

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