Python 构建docker映像时pip版本失败

我正在尝试从python应用程序创建docker映像，但在尝试安装时收到一条关于我的pip版本的错误消息：

Collecting tensorflow==1.2.1 (from -r requirements.txt (line 20))
Could not find a version that satisfies the requirement tensorflow==1.2.1 (from -r requirements.txt (line 20)) (from versions: )
No matching distribution found for tensorflow==1.2.1 (from -r requirements.txt (line 20))
You are using pip version 7.1.2, however version 9.0.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.

但当我检查我的pip版本时，它是最新的：

pip -V
pip 9.0.1 from /Users/xxx/anaconda/lib/python3.6/site-packages (python 3.6)

那么为什么docker链接到错误的pip版本呢？

---

我正在Mac High Sierra上跑步。

发布您的dockerfile。您正在主机上检查pip版本，而不是在docker容器中添加#更新pip运行pip安装--将pip升级到我的docker文件修复了该问题。谢谢