python安装换源_Python中安装框架如何换源以及升级

想安装tornado框架&＃xff0c;但总是有奇怪错误&＃xff0c;如下&＃xff1a;

如果按照默认的下载源&＃xff0c;就会死活不成功&＃xff0c;出现

Traceback (most recent call last):

File "e:\python38\lib\site-packages\pip\_vendor\urllib3\response.py", line 397, in _error_catcher

yield

File "e:\python38\lib\site-packages\pip\_vendor\urllib3\response.py", line 479, in read

data &＃61; self._fp.read(amt)

File "e:\python38\lib\site-packages\pip\_vendor\cachecontrol\filewrapper.py", line 62, in read

data &＃61; self.__fp.read(amt)

File "e:\python38\lib\http\client.py", line 454, in read

n &＃61; self.readinto(b)

File "e:\python38\lib\http\client.py", line 498, in readinto

n &＃61; self.fp.readinto(b)

File "e:\python38\lib\socket.py", line 669, in readinto

return self._sock.recv_into(b)

File "e:\python38\lib\ssl.py", line 1241, in recv_into

return self.read(nbytes, buffer)

.......

这样的的错误。

解决办法是&＃xff0c;换源下载

pip install tornado -i https://pypi.douban.com/simple

pip国内的一些镜像

建议安装pip都换个国内源&＃xff0c;这样下载速度会快些&＃xff0c;容易成功些。

格式&＃xff1a;pip install ****** -i 源地址

需要注意的是&＃xff0c;当在cmd里换源后&＃xff0c;只对Python自带的idea有效&＃xff0c;pycharm还是默认源&＃xff0c;只要自己网稍微慢点就容易失败。

所以&＃xff0c;需要知道pycharm的换源方法

如果还是报错&＃xff0c;升个级试试

pip install --upgrade pip