使用pip install onnxruntime报错：
ERROR: Could not find a version that satisfies the requirement onnxruntime (from versions: none) ERROR: No matching distribution found for onnxruntime看了onnxruntime issue建议使用pip3安装
但是当时的安装环境（python3.5）安装pip3有403的error，查看当时可以安装onnxruntime的环境要求：
Defaulting to user installation because normal site-packages is not writeable Requirement already satisfied: onnxruntime in ./.local/lib/python3.6/site-packages (1.3.0) Requirement already satisfied: onnx>=1.2.3 in ./.local/lib/python3.6/site-packages (from onnxruntime) (1.7.0) Requirement already satisfied: numpy>=1.16.6 in ./.local/lib/python3.6/site-packages (from onnxruntime) (1.17.4) Requirement already satisfied: protobuf in ./.local/lib/python3.6/site-packages (from onnxruntime) (3.10.0) Requirement already satisfied: typing-extensions>=3.6.2.1 in /usr/local/lib/python3.6/dist-packages (from onnx>=1.2.3->onnxruntime) (3.7.4) Requirement already satisfied: six in ./.local/lib/python3.6/site-packages (from onnx>=1.2.3->onnxruntime) (1.13.0) Requirement already satisfied: setuptools in ./.local/lib/python3.6/site-packages (from protobuf->onnxruntime) (42.0.0)于是我就升级python版本
sudo apt-get install software-properties-common python-software-properties sudo apt-get install software-properties-common sudo apt-add-repository http://apt.tvheadend.org/stable sudo add-apt-repository ppa:jonathonf/python-3.6 sudo apt-get update sudo apt-get install python3.6重新装pip3，然后再装onnxruntime ok了。。。
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更新下：onnxruntime要求python版本到3.6，只要安装好python3.6就可以了
1、安装python3.6 sudo add-apt-repository ppa:jonathonf/python-3.6 sudo apt-get update sudo apt-get install python3.6 2、安装pip3.6 wget https://bootstrap.pypa.io/get-pip.py sudo python3.6 get-pip.py 在安装scipy时，会出现以下错误，可执行 pip3.6 install --ignore-installed scipy就可以规避了 Cannot uninstall 'scipy'. It is a distutils installed project and thus we cannot accurately determine which files belong to it which would lead to only a partial uninstall
