(py37_vnpy) D:\VNPY>pip install -r requirements.txt -i http://pypi.douban.c
om/simple --trusted-host pypi.douban.com
Looking in indexes: http://pypi.douban.com/simple
ERROR: Could not find a version that satisfies the requirement vnpy==3.0b0
(from versions: 1.5, 1.6.2b0, 1.6.2, 1.7.0, 1.7.2, 1.7.3, 1.8.0, 1.9.0, 1.9
.1, 1.9.2)
ERROR: No matching distribution found for vnpy==3.0b0
(py37_vnpy) D:\VNPY>
