本文主要是介绍PYTHON设置默认清华源，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
首先打开windows的运行窗口输入 %appdata% ，或者打开目“C:\Users\Administrator\AppData\Roaming”
在新弹出的窗口新建一个pip的文件夹，进入文件夹后，创建一个pip.ini的文件，在文件中写入如下内容：
[global]timeout = 6000index-url = https://pypi.tuna.tsinghua.edu.cn/simpletrusted-host = pypi.tuna.tsinghua.edu.cn
文件内容保存好后，使用pip安装第三方库即可从清华源下载。
问题一：python安装django报错
[C:\~]$ pip install django
Looking in indexes: https://pypi.tuna.tsinghua.edu.cn/simple
ERROR: Exception:
Traceback (most recent call last):File "C:\Users\Administrator\AppData\Local\Programs\Python\Python39\lib\site-packages\pip\_internal\cli\base_command.py", line 173, in _mainstatus = self.run(options, args)File "C:\Users\Administrator\AppData\Local\Programs\Python\Python39\lib\site-packages\pip\_internal\cli\req_command.py", line 203, in wrapperreturn func(self, options, args)File "C:\Users\Administrator\AppData\Local\Programs\Python\Python39\lib\site-packages\pip\_internal\commands\install.py", line 315, in runrequirement_set = resolver.resolve(File "C:\Users\Administrator\AppData\Local\Programs\Python\Python39\lib\site-packages\pip\_internal\resolution\resolvelib\resolver.py", line 94, in resolveresult = self._result = resolver.resolve(File "C:\Users\Administrator\AppData\Local\Programs\Python\Python39\lib\site-packages\pip\_vendor\resolvelib\resolvers.py", line 472, in resolvestate = resolution.resolve(requirements, max_rounds=max_rounds)File "C:\Users\Administrator\AppData\Local\Programs\Python\Python39\lib\site-packages\pip\_vendor\resolvelib\resolvers.py", line 341, in resolveself._add_to_criteria(self.state.criteria, r, parent=None)File "C:\Users\Administrator\AppData\Local\Programs\Python\Python39\lib\site-packages\pip\_vendor\resolvelib\resolvers.py", line 172, in _add_to_criteriaif not criterion.candidates:File "C:\Users\Administrator\AppData\Local\Programs\Python\Python39\lib\site-packages\pip\_vendor\resolvelib\structs.py", line 151, in __bool__return bool(self._sequence)File "C:\Users\Administrator\AppData\Local\Programs\Python\Python39\lib\site-packages\pip\_internal\resolution\resolvelib\found_candidates.py", line 140, in __bool__return any(self)File "C:\Users\Administrator\AppData\Local\Programs\Python\Python39\lib\site-packages\pip\_internal\resolution\resolvelib\found_candidates.py", line 128, in <genexpr>return (c for c in iterator if id(c) not in self._incompatible_ids)File "C:\Users\Administrator\AppData\Local\Programs\Python\Python39\lib\site-packages\pip\_internal\resolution\resolvelib\found_candidates.py", line 29, in _iter_builtfor version, func in infos:File "C:\Users\Administrator\AppData\Local\Programs\Python\Python39\lib\site-packages\pip\_internal\resolution\resolvelib\factory.py", line 272, in iter_index_candidate_infosresult = self._finder.find_best_candidate(File "C:\Users\Administrator\AppData\Local\Programs\Python\Python39\lib\site-packages\pip\_internal\index\package_finder.py", line 851, in find_best_candidatecandidates = self.find_all_candidates(project_name)File "C:\Users\Administrator\AppData\Local\Programs\Python\Python39\lib\site-packages\pip\_internal\index\package_finder.py", line 798, in find_all_candidatespage_candidates = list(page_candidates_it)File "C:\Users\Administrator\AppData\Local\Programs\Python\Python39\lib\site-packages\pip\_internal\index\sources.py", line 134, in page_candidatesyield from self._candidates_from_page(self._link)File "C:\Users\Administrator\AppData\Local\Programs\Python\Python39\lib\site-packages\pip\_internal\index\package_finder.py", line 758, in process_project_urlhtml_page = self._link_collector.fetch_page(project_url)File "C:\Users\Administrator\AppData\Local\Programs\Python\Python39\lib\site-packages\pip\_internal\index\collector.py", line 490, in fetch_pagereturn _get_html_page(location, session=self.session)File "C:\Users\Administrator\AppData\Local\Programs\Python\Python39\lib\site-packages\pip\_internal\index\collector.py", line 400, in _get_html_pageresp = _get_html_response(url, session=session)File "C:\Users\Administrator\AppData\Local\Programs\Python\Python39\lib\site-packages\pip\_internal\index\collector.py", line 115, in _get_html_responseresp = session.get(File "C:\Users\Administrator\AppData\Local\Programs\Python\Python39\lib\site-packages\pip\_vendor\requests\sessions.py", line 555, in getreturn self.request('GET', url, **kwargs)File "C:\Users\Administrator\AppData\Local\Programs\Python\Python39\lib\site-packages\pip\_internal\network\session.py", line 454, in requestreturn super().request(method, url, *args, **kwargs)File "C:\Users\Admin剋istrator\AppData\Local\Programs\Python\Python39\lib\site-packages\pip\_vendor\requests\sessions.py", line 542, in requestresp = self.send(prep, **send_kwargs)File "C:\Users\Administrator\AppData\Local\Programs\Python\Python39\lib\site-packages\pip\_vendor\requests\sessions.py", line 655, in sendr = adapter.send(request, **kwargs)File "C:\Users\Administrator\AppData\Local\Programs\Python\Python39\lib\site-packages\pip\_vendor\cachecontrol\adapter.py", line 53, in sendresp = super(CacheControlAdapter, self).send(request, **kw)File "C:\Users\Administrator\AppData\Local\Programs\Python\Python39\lib\site-packages\pip\_vendor\requests\adapters.py", line 439, in sendresp = conn.urlopen(File "C:\Users\Administrator\AppData\Local\Programs\Python\Python39\lib\site-packages\pip\_vendor\urllib3\connectionpool.py", line 696, in urlopenself._prepare_proxy(conn)File "C:\Users\Administrator\AppData\Local\Programs\Python\Python39\lib\site-packages\pip\_vendor\urllib3\connectionpool.py", line 964, in _prepare_proxyconn.connect()File "C:\Users\Administrator\AppData\Local\Programs\Python\Python39\lib\site-packages\pip\_vendor\urllib3\connection.py", line 359, in connectconn = self._connect_tls_proxy(hostname, conn)File "C:\Users\Administrator\AppData\Local\Programs\Python\Python39\lib\site-packages\pip\_vendor\urllib3\connection.py", line 500, in _connect_tls_proxyreturn ssl_wrap_socket(File "C:\Users\Administrator\AppData\Local\Programs\Python\Python39\lib\site-packages\pip\_vendor\urllib3\util\ssl_.py", line 453, in ssl_wrap_socketssl_sock = _ssl_wrap_socket_impl(sock, context, tls_in_tls)File "C:\Users\Administrator\AppData\Local\Programs\Python\Python39\lib\site-packages\pip\_vendor\urllib3\util\ssl_.py", line 495, in _ssl_wrap_socket_implreturn ssl_context.wrap_socket(sock)File "C:\Users\Administrator\AppData\Local\Programs\Python\Python39\lib\ssl.py", line 500, in wrap_socketreturn self.sslsocket_class._create(File "C:\Users\Administrator\AppData\Local\Programs\Python\Python39\lib\ssl.py", line 997, in _createraise ValueError("check_hostname requires server_hostname")
ValueError: check_hostname requires server_hostname
可以看到最后一行报错：ValueError: check_hostname requires server_hostname
解决办法：查看电脑是否有代理的存在，如果有代理需要关闭代理。
问题二：pip安装第三方库报错
[root@localhost ~]# python -m pip install ipython
/usr/local/bin/python: No module named pip解决办法如下：
python3可以使用这个脚本，https://bootstrap.pypa.io/get-pip.py
python2可以使用如下脚本
# python2解决办法
[root@localhost ~]# wget https://bootstrap.pypa.io/pip/2.7/get-pip.py[root@localhost ~]# python get-pip.py
DEPRECATION: Python 2.7 reached the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 is no longer maintained. pip 21.0 will drop support for Python 2.7 in January 2021. More details about Python 2 support in pip can be found at https://pip.pypa.io/en/latest/development/release-process/#python-2-support pip 21.0 will remove support for this functionality.
Collecting pip<21.0Downloading pip-20.3.4-py2.py3-none-any.whl (1.5 MB)|████████████████████████████████| 1.5 MB 93 kB/s
Collecting wheelDownloading wheel-0.37.1-py2.py3-none-any.whl (35 kB)
Installing collected packages: pip, wheel
Successfully installed pip-20.3.4 wheel-0.37.1[root@localhost ~]# pip -V
WARNING: pip is being invoked by an old script wrapper. This will fail in a future version of pip.
Please see https://github.com/pypa/pip/issues/5599 for advice on fixing the underlying issue.
To avoid this problem you can invoke Python with '-m pip' instead of running pip directly.
pip 20.3.4 from /usr/lib/python2.7/site-packages/pip (python 2.7)
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