使用pip来安装python包有时候安装起来会非常慢,因此需要换成国内的源来加速下载:
1 单次修改源
以Torch为例,常规下载方式为:
pip install torch
修改为阿里源:
pip install -i https://mirrors.aliyun.com/pypi/simple torch
2 修改默认源
如果不想在每一次下载都指定源,可以直接修改默认源。
2.1 Linux
linux下运行命令:
vi ~/.pip/pip.conf
然后写入如下内容并保存(以阿里源为例):
[global]
trusted-host = mirrors.aliyun.com
index-url = https://mirrors.aliyun.com/pypi/simple
2.2 Windows
windows下找到pip.ini
文件,默认路径为:C:\Users\xxx\AppData\Roaming\pip\pip.ini
。
然后写入如下内容并保存(以阿里源为例):
[global]
trusted-host = mirrors.aliyun.com
index-url = https://mirrors.aliyun.com/pypi/simple
3 常用的国内源
阿里云:http://mirrors.aliyun.com/pypi/simple/
豆瓣 :http://pypi.doubanio.com/simple/
清华大学:https://pypi.tuna.tsinghua.edu.cn/simple/
中国科学技术大学:http://pypi.mirrors.ustc.edu.cn/simple/
华中理工大学:http://pypi.hustunique.com/
山东理工大学:http://pypi.sdutlinux.org/
4 常见报错
4.1 若无法连接
WARNING: The repository located at pypi.doubanio.com is not a trusted or secure host and is being ignored. If this repository is available via HTTPS we recommend you use HTTPS instead, otherwise you may silence this warning and allow it anyway with '--trusted-host pypi.doubanio.com'.
ERROR: Could not find a version that satisfies the requirement opencv-python (from versions: none)
ERROR: No matching distribution found for opencv-python
可以将源中的http改为https
4.2 需要 user
Could not install packages due to an EnvironmentError: [Errno 13] Permission denied: '/anaconda3/lib/python3.7/site-packages/llvmlite-0.28.0.dist-info'
Consider using the--user
option or check the permissions.
需要加上--user:pip install
pip install --user -i https://pypi.tuna.tsinghua.edu.cn/simple torch
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