需要爬取的内容:汽车具体型号,指导价,经销商报价,车主参考价
import requests
import pymysql
# 车型库
def Dongchedi(offset):
url = 'https://www.dongchedi.com/motor/brand/m/v6/select/series/?city_name=%E6%AD%A6%E6%B1%89'
headers = {'user-agent': 'Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36'}
data = {
'offset': '{}'.format(offset),
'limit': 30,
'is_refresh': 1,
'city_name': '武汉'
}
response = requests.post(url, headers=headers, data=data).json()
all_cak = response['data']['series']
for caks in all_cak:
caks_id = caks['concern_id']
caks_url = 'https://www.dongchedi.com/auto/series/' + '{}'.format(caks_id)
cak_name = caks['outter_name']
print(cak_name, caks_url)
return caks_id
# 详情页
def Detail():
for offset in range(0, 2000):
caks_id = Dongchedi(offset)
datail_url = 'https://www.dongchedi.com/motor/car_page/m/v1/series_all_json/?series_id=' + str(caks_id) + '&city_name=武汉&show_city_price=1&m_station_dealer_price_v=1'
response = requests.get(datail_url).json()
series_all = response['data']
online_name = series_all['online']
for data_name in online_name:
name_info = data_name['info'] # 全部车型模块所有数据
try:
if name_info['brand_name']: # 判断是否为总型号
series_name = name_info['name'] # 所有详细车型名称
car_name = name_info['series_name']
name = str(car_name) + '-' + str(series_name)
# 指导价, 经销商报价 -价格字典
price_info = name_info['price_info']
dealer_price = str(price_info['official_price']) # 指导价
official_price1 = name_info['dealer_price'] # 经销商报价
official_price = official_price1.replace('万', '') # 去除 ‘万’
# 车主参考价 -价格字典
owner_price_summary = name_info['owner_price_summary']
naked_price_avg = owner_price_summary['naked_price_avg'] # 车主参考价
# 保存数据库
data_info = (name, dealer_price, official_price, naked_price_avg)
SaveMysql(data_info)
except Exception as error:
# print(error)
pass
# 保存到数据库
def SaveMysql(data_info):
conn = pymysql.connect(host='127.0.0.1', port=3306, user='root', password='root', db='spiders', charset="utf8") # 连接数据库 192.168.20.124
cursor = conn.cursor() # 创建游标
insert_sql = 'insert into dongchedi(car_name,guide_price,dealer_price,owner_price) values(%s, %s, %s, %s)' # 创建写入sql
cursor.execute(insert_sql, data_info) # 写入操作
print('save to mysql')
conn.commit() # 提交
cursor.close() # 关闭游标
conn.close() # 关闭数据库
if __name__ == '__main__':
try:
Detail()
except Exception:
pass
爬取信息:
遇到的问题:
数据方面还没有处理
数据方面还没有处理,比如三个价格有一个或者多个不存在时,现在的情况是直接报错(当价格不存在时,该价格字段是没有的)
因为try过了所以价格不存在时那条数据就直接过率掉了。
我们需要的是当价格不存在时,用None填充(后续有时间再解决一下)。
incorrect string value:‘xx\xx…’ for column ‘car_name’ at row 1
报错的大概意思就是存入的字符串不正确。但是debug得到的数据是没有问题的,后来重新创建了数据库和表,问题就解决了。
错误原因:创建表的时候没有指定 ‘ 字符集’ 和 ‘排序规则’。
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