使用Google自定义搜索API下载图片
我之前在Python中使用了谷歌图片API,下载了前20张图片,代码如下:
import os
import sys
import time
from urllib import FancyURLopener
import urllib2
import simplejson
searchTerm = "Cat"
# Replace spaces ' ' in search term for '%20' in order to comply with request
searchTerm = searchTerm.replace(' ','%20')
# Start FancyURLopener with defined version
class MyOpener(FancyURLopener):
version = 'Mozilla/5.0 (Windows; U; Windows NT 5.1; it; rv:1.8.1.11) Gecko/20071127 Firefox/2.0.0.11'
myopener = MyOpener()
# Set count to 0
count=0
for i in range(0,4):
# Notice that the start changes for each iteration in order to request a new set of images for each loop
url = ('https://ajax.googleapis.com/ajax/services/search/images?'+'v=1.0&q='+searchTerm7+'&start='+str(i*4)+'&userip=MyIP&imgsz=xlarge|xxlarge|huge')
print url
request = urllib2.Request(url, None, {'Referer': 'testing'})
response = urllib2.urlopen(request)
# Get results using JSON
results = simplejson.load(response)
data = results['responseData']
dataInfo = data['results']
# Iterate for each result and get unescaped url
for myUrl in dataInfo:
count = count + 1
print myUrl['unescapedUrl']
os.chdir(newpath)
myopener.retrieve(myUrl['unescapedUrl'],str(num)+'-'+str(count))
# Sleep for one second to prevent IP blocking from Google
time.sleep(3)
但现在我想用谷歌自定义搜索来实现这个功能,这样可以得到更好的结果。我知道我需要注册一个API密钥,但我找不到像我之前那样简单的示例代码。有没有人能帮我一下,我在谷歌的文档里真的很迷茫。
看起来免费的API有一些限制,每天只能请求100次,是这样吗?
编辑:我现在在这里,但还是不行
import os
import sys
import time
from urllib import FancyURLopener
import urllib2
import simplejson
import cStringIO
import pprint
searchTerm="Cat"
# Start FancyURLopener with defined version
class MyOpener(FancyURLopener):
version = 'Mozilla/5.0 (Windows; U; Windows NT 5.1; it; rv:1.8.1.11) Gecko/20071127 Firefox/2.0.0.11'
myopener = MyOpener()
url='https://www.googleapis.com/customsearch/v1?key=API_KEY&cx=017576662512468239146:omuauf_lfve'+'&q='+searchTerm+'&searchType=image'+'&start=0'+'&imgSize=xlarge|xxlarge|huge'
print url
request = urllib2.Request(url, None, {'Referer': 'testing'})
response = urllib2.urlopen(request)
# Get results using JSON
data = json.load(response)
pprint.PrettyPrinter(indent=4).pprint(data['items'][0])
2 个回答
21
你可以使用这个 Google API Python 客户端库 来进行开发。
示例:
from apiclient.discovery import build
service = build("customsearch", "v1",
developerKey="** your developer key **")
res = service.cse().list(
q='butterfly',
cx=' ** your cx **',
searchType='image',
num=3,
imgType='clipart',
fileType='png',
safe= 'off'
).execute()
if not 'items' in res:
print 'No result !!\nres is: {}'.format(res)
else:
for item in res['items']:
print('{}:\n\t{}'.format(item['title'], item['link']))
输出:
Clipart - Butterfly:
http://openclipart.org/image/800px/svg_to_png/3965/jonata_Butterfly.png
Animal, Butterfly, Insect, Nature - Free image - 158831:
http://pixabay.com/static/uploads/photo/2013/07/13/11/51/animal-158831_640.png
Clipart - Monarch Butterfly:
http://openclipart.org/image/800px/svg_to_png/110023/Monarch_Butterfly_by_Merlin2525.png
是的,免费
版是有一些限制的,你可以通过 Google 开发者控制台 来监控这些限制:
注意:
去你的 自定义搜索引擎,然后选择你的 自定义搜索引擎,接着在 基本设置 标签中,设置 图片搜索
选项为 开启
,在 搜索的网站
部分,选择 搜索整个网络,但强调包含的网站
选项。
链接:
- https://google-api-client-libraries.appspot.com/documentation/customsearch/v1/python/latest/customsearch_v1.cse.html
- https://developers.google.com/custom-search/json-api/v1/reference/cse/list
- https://www.google.com/cse/all
- https://developers.google.com/api-client-library/python/apis/customsearch/v1
- https://console.developers.google.com/project
- https://developers.google.com/api-client-library/python/start/get_started
- https://developers.google.com/api-client-library/python/guide/aaa_apikeys