<E> [23:08:07] Error accessing 'https://c.pcs.baidu.com/rest/2.0/pcs/file'
<E> [23:08:07] Exception:
<class 'requests.exceptions.ConnectionError'> - HTTPSConnectionPool(host='c.pcs.baidu.com', port=443): Max retries exceeded with url: /rest/2.0/pcs/file?method=upload&path=...(Caused by NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x7fdb879a0d00>: Failed to establish a new connection: [Errno 101] Network is unreachable'))
一台服务器上既可以上传也可以下载，但另一台服务器不能上传，下载没有问题。
bypy upload -v -d --disable-ssl-check