问题描述：目标检测或者图像分割需要大量的数据，如果手动从网上找的话会比较慢，这时候，我们可以从网上爬虫下来，然后自己筛选即可。
代码如下（不要忘记安装代码依赖的库）：
# -*- coding: utf-8 -*-
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=' ')这里以搜索明星的图片为例，运行代码，然后根据提示输入搜索图片的名字→搜索图片的张数→保存本地的文件夹即可。
文章来源：https://www.toymoban.com/news/detail-693446.html
注意：运行的时候只能使用国内网站，而不能使用外网。不然会出现这个错误→requests.exceptions.SSLError: HTTPSConnectionPool(host='image.baidu.com', port=443): Max retries exceeded with url: /search/flip?tn=baiduimage&ie=utf-8&word=%E6%A1%82%E6%9E%97&pn= (Caused by SSLError(SSLZeroReturnError(6, 'TLS/SSL connection has been closed (EOF) (_ssl.c:1131)')))文章来源地址https://www.toymoban.com/news/detail-693446.html
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