我只是python的初学者,很抱歉遇到的这个基本问题
在此处输入图像描述
import pymongo
client = pymongo.MongoClient('localhost', 27017)
ceshi = client['ceshi']
item_info = ['item_info3']
for i in item_info:
if i.find('area'):
print(i)
我正在使用Jupiter进行编辑,但在导入pymongo后,我无法列出我存储在MongoDB中的数据。原因可能是什么?
from bs4 import BeautifulSoup
import requests
import time
import pymongo
client = pymongo.MongoClient('localhost',27017)
ceshi = client['ceshi']
url_list = ceshi['url_list3']
item_info = ceshi['item_info3']
def get_links_from(channel,pages,who_sells=0):
#http://bj.58.com/diannao/0/pn2/
list_view = '{}{}/pn{}/'.format(channel,str(who_sells),str(pages))
wb_date = requests.get(list_view)
time.sleep(1)
soup = BeautifulSoup(wb_date.text,'lxml')
links = soup.select('tr.zzinfo > td.t > a.t')
if soup.find('td','t'):
for link in links:
item_link = link.get('href').split('?')[0]
else:
pass
url_list.insert_one({'url':item_link})
print(url_list)
def get_item_info(url):
wb_data = requests.get(url)
soup = BeautifulSoup(wb_data.text,'lxml')
no_longer_exist = '404' in
soup.find('script',type="text/javascript").get('src').split('/')
if no_longer_exist:
pass
else:
title = soup.title.text
price = soup.select('span.price.c_f50')[0].text
date = soup.select('li.time')[0].text
area = list(soup.select('spam.c_25d a')[0].stripped_strings) if
soup.find_all('c_25d') else None
item_info.insert_one({标题:标题,价格:价格,日期:日期,区域:区域})
print(item_info)
#print({'title':title,'price':price,'date':date,'area':area})
get_item_info('http://bj.58.com/pingbandiannao/25347275157966x.shtml')
#get_links_from('http://bj.58.com/yunfuyongpin/',2)
看起来像是在一个字符串数组中循环,并试图在字符串上调用find:
item_info = ['item_info3']
for i in item_info:
if i.find('area')
如果item_info3
是ceshi
数据库中mongo集合的名称,那么您应该执行以下操作:
item_info = ceshi['item_info3']
即便如此,我也不相信您的查找查询是正确的。应该是这样的:
for i in item_info.find():
print(i)
关于Mongo/python:的更多信息
https://docs.mongodb.org/getting-started/python/query/