python url 下载并保存

方法一：用urllib

import json
import urllib
url_model='{"version":"2","url":"http:\/\/20180803.oss-cn-shanghai.aliyuncs.com\/video\/frozen_inference_graph_2.pb","instruction":"8967"}'
url_model_txt=json.loads(url_model)
url = url_model_txt['url']

print "downloading with urllib"
urllib.urlretrieve(url, "./3.pb")
方法二：

import json

import urllib2

url_model='{"version":"2","url":"http:\/\/20180803.oss-cn-shanghai.aliyuncs.com\/video\/frozen_inference_graph_2.pb","instruction":"8967"}'
url_model_txt=json.loads(url_model)
url = url_model_txt['url']

f = urllib2.urlopen(url)

data = f.read()
with open("./2/frozen_inference_graph.pb", "wb") as code:
    code.write(data)

方法三：

url_model='{"version":"2","url":"http:\/\/20180803.oss-cn-shanghai.aliyuncs.com\/video\/frozen_inference_graph_2.pb","instruction":"8967"}'
url_model_txt=json.loads(url_model)
url = url_model_txt['url']

f = requests.get(url)

with open("./2.pb","wb") as code:

    code.write(f.content)