urllib3

I am a new developer and learning to code in Python 3.4.2. I am running Debian linux on a Raspberry Pi3. After the fresh install I did both sudo apt-get update and sudo apt-get upgrade to get everything up to date. I am trying to test a section of code which uploads a file to Dropbox: import dropbox import urllib3 authkey = (my dropbox dev auth key) with open('test.csv','rb') as f: dbx = dropbox.Dropbox(authkey) dbx.files_upload(f.read(), '/test.csv') Now, I have no idea if the actual Dropbox code is correct, because I am getting the following error when I run the script in the Python shell:

一、urllib、urllib2、urllib3、requests urllib2室python2中的，python3合并了urllib和urllib2到urllib目录下，所以python3直接使用urllib。 urllib3是一个三方库，它提供了连接池、客户端SSL/TLS验证、文件编码上传、HTTP重定向、gzip和deflate压缩编码、HTTP和SOCKS代理等功能。 requests也是一个三方库，它依赖于urllib3，做了一些封装，所以一般使用requests的比较多。 二、urlopen from urllib import request,parse response = request.urlopen(r'http://www.baidu.com', timeout=3000) # <class 'http.client.HTTPResponse'> print(type(response)) content = response.read() # <class 'bytes'> print(type(content)) print(content.decode('utf-8')) # 传递参数 param = parse.urlencode({'id': '2'}) data = bytes(param, encoding='utf8') response

I've implemented a retry mechanism to requests session using urllib3.util.retry as suggested both here and here . Now, I am trying to figure out what is the best way to add a callback function that will be called on every retry attempt. To explain myself even more, if either the Retry object or the requests get method had a way to add a callback function, it would have been great. Maybe something like: import requests from requests.packages.urllib3.util.retry import Retry from requests.adapters import HTTPAdapter def retry_callback(url): print url s = requests.Session() retries = Retry(total=5

I have just started using urllib3, and I am running into a problem straightaway. According to their manuals, I started off with the simple example: Python 2.7.1+ (r271:86832, Apr 11 2011, 18:13:53) [GCC 4.5.2] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import urllib3 >>> >>> http = urllib3.PoolManager() >>> r = http.request('GET', 'http://google.com/') I get thrown the following error: Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/usr/local/lib/python2.7/dist-packages/urllib3/request.py", line 65, in request **urlopen_kw