python爬虫获取网络图片
记录一下利用爬虫获取网络图片
具体操作来自博客:Python 爬虫系列教程一爬取批量百度图片
我的编辑器是vscode,首先安装三个包
pip install BeautifulSoup
pip insatll requests
pip install lxml
安装第一个包时,输出报错没安装上,但是利用pip list查时,确实有这个包,应该是run code的问题,我采用终端运行。
这是一个解决办法,供参考。关于VS code中 import后却显示no module的问题解决(明明安装了却无法导入,终端可以运行,输出端不行)
大佬的这个代码不需要修改,安装三个包之后可以立即运行起来。
放上源代码
# -*- coding: utf-8 -*-
"""
Created on Sun Sep 13 21:32:25 2020
@author: ydc
"""
import re
import requests
from urllib import error
from bs4 import BeautifulSoup
import os
num = 0
numPicture = 0
file = ''
List = []
def Find(url, A):
global List
print('正在检测图片总数,请稍等.....')
t = 0
i = 1
s = 0
while t < 1000:
Url = url + str(t)
try:
# 这里搞了下
Result = A.get(Url, timeout=7, allow_redirects=False)
except BaseException:
t = t + 60
continue
else:
result = Result.text
pic_url = re.findall('"objURL":"(.*?)",', result, re.S) # 先利用正则表达式找到图片url
s += len(pic_url)
if len(pic_url) == 0:
break
else:
List.append(pic_url)
t = t + 60
return s
def recommend(url):
Re = []
try:
html = requests.get(url, allow_redirects=False)
except error.HTTPError as e:
return
else:
html.encoding = 'utf-8'
bsObj = BeautifulSoup(html.text, 'html.parser')
div = bsObj.find('div', id='topRS')
if div is not None:
listA = div.findAll('a')
for i in listA:
if i is not None:
Re.append(i.get_text())
return Re
def dowmloadPicture(html, keyword):
global num
# t =0
pic_url = re.findall('"objURL":"(.*?)",', html, re.S) # 先利用正则表达式找到图片url
print('找到关键词:' + keyword + '的图片,即将开始下载图片...')
for each in pic_url:
print('正在下载第' + str(num + 1) + '张图片,图片地址:' + str(each))
try:
if each is not None:
pic = requests.get(each, timeout=7)
else:
continue
except BaseException:
print('错误,当前图片无法下载')
continue
else:
string = file + r'\\' + keyword + '_' + str(num) + '.jpg'
fp = open(string, 'wb')
fp.write(pic.content)
fp.close()
num += 1
if num >= numPicture:
return
if __name__ == '__main__': # 主函数入口
##############################
# 这里加了点
headers = {
'Accept-Language': 'zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2',
'Connection': 'keep-alive',
'User-Agent': 'Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Firefox/60.0',
'Upgrade-Insecure-Requests': '1'
}
A = requests.Session()
A.headers = headers
###############################
word = input("请输入搜索关键词(可以是人名,地名等): ")
# add = 'http://image.baidu.com/search/flip?tn=baiduimage&ie=utf-8&word=%E5%BC%A0%E5%A4%A9%E7%88%B1&pn=120'
url = 'https://image.baidu.com/search/flip?tn=baiduimage&ie=utf-8&word=' + word + '&pn='
# 这里搞了下
tot = Find(url, A)
Recommend = recommend(url) # 记录相关推荐
print('经过检测%s类图片共有%d张' % (word, tot))
numPicture = int(input('请输入想要下载的图片数量 '))
file = input('请建立一个存储图片的文件夹,输入文件夹名称即可')
y = os.path.exists(file)
if y == 1:
print('该文件已存在,请重新输入')
file = input('请建立一个存储图片的文件夹,)输入文件夹名称即可')
os.mkdir(file)
else:
os.mkdir(file)
t = 0
tmp = url
while t < numPicture:
try:
url = tmp + str(t)
# 这里搞了下
result = A.get(url, timeout=10, allow_redirects=False)
except error.HTTPError as e:
print('网络错误,请调整网络后重试')
t = t + 60
else:
dowmloadPicture(result.text, word)
t = t + 60
print('当前搜索结束,感谢使用')
print('猜你喜欢')
for re in Recommend:
print(re, end=' ')
在终端输入python p.py运行程序后
按提示输入你想要的图片、数量等后
等待下载就ok了!
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