Looking in indexes: http://mirrors.aliyun.com/pypi/simple/
Collecting panda
The repository located at mirrors.aliyun.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 mirrors.aliyun.com’.
Could not find a version that satisfies the requirement panda (from versions: )
翻译得，不信任镜像。 Options，加入参数 -trusted-host mirrors.aliyun.com