pip从手动创建的存储库安装包失败

Question

我在机器10.x.x.x上创建了一个python存储库，它可以通过Web浏览器访问（设置Apache服务器）。

我正在验证其在不同机器上的成功操作，但是由于下面提到的错误而失败了

[root@localhost ~]# pip install --index-url=http://10.x.x.x/repos/python/python2 -r requirement.txt --trusted-host 10.x.x.x
Looking in indexes: http://10.x.x.x/repos/python/python2
Collecting Flask==1.0.2 (from -r requirement.txt (line 1))
  Could not find a version that satisfies the requirement Flask==1.0.2 (from -r requirement.txt (line 1)) (from versions: )
No matching distribution found for Flask==1.0.2 (from -r requirement.txt (line 1))
[root@localhost ~]#

需求文件包含

[root@localhost ~]# cat requirement.txt
Flask==1.0.2
[root@localhost ~]#

Python版本是2.7.5，存储库机器和测试机器上的pip版本如下：

# pip -V
pip 10.0.1 from /usr/lib/python2.7/site-packages/pip-10.0.1-py2.7.egg/pip (python 2.7)
[root@localhost ~]#

有关如何解决此问题的任何想法？