title: onnx2nnoir: command not found after installation of nnoir-onnx
body: <p>I've downloaded an <code>.onnx</code> model (<a href="https://github.com/onnx/models/blob/main/vision/classification/resnet/model/resnet50-v2-7.onnx" rel="nofollow noreferrer">https://github.com/onnx/models/blob/main/vision/classification/resnet/model/resnet50-v2-7.onnx</a>) and trying to convert in to <code>.nnoir</code> format. I've renamed the file to <code>model.onnx</code> and trying to convert it using the command lines given in the <strong>Example</strong> section of the library description(<a href="https://pypi.org/project/nnoir-onnx/" rel="nofollow noreferrer">https://pypi.org/project/nnoir-onnx/</a>).
  But the command lines are being problematic so I am not being able to convert the model to <code>.nnoir</code> format.
  The logs are attached as a <code>.txt</code> file and also given below.
  <a href="https://github.com/Idein/nnoir/files/9177835/onnx-nnoir.txt" rel="nofollow noreferrer">onnx-nnoir.txt</a></p>
  <pre><code>user02@ubuntu:~/Downloads$ onnx2nnoir -o model.nnoir model.onnx
  onnx2nnoir: command not found
  user02@ubuntu:~/Downloads$ pip install nnoir-onnx
  Requirement already satisfied: nnoir-onnx in /home/user02/.local/lib/python3.8/site-packages (1.0.15)
  Requirement already satisfied: importlib-metadata&lt;5,&gt;=4 in /home/user02/.local/lib/python3.8/site-packages (from nnoir-onnx) (4.12.0)
  Requirement already satisfied: msgpack&lt;2,&gt;=1 in /home/user02/.local/lib/python3.8/site-packages (from nnoir-onnx) (1.0.4)
  Requirement already satisfied: onnx&lt;1.12.0 in /home/user02/.local/lib/python3.8/site-packages (from nnoir-onnx) (1.11.0)
  Requirement already satisfied: numpy&lt;2,&gt;=1 in /home/user02/.local/lib/python3.8/site-packages (from nnoir-onnx) (1.23.1)
  Requirement already satisfied: nnoir&lt;2.0.0,&gt;=1.0.9 in /home/user02/.local/lib/python3.8/site-packages (from nnoir-onnx) (1.0.9)
  Requirement already satisfied: protobuf&lt;4.0,&gt;=3.8 in /home/user02/.local/lib/python3.8/site-packages (from nnoir-onnx) (3.20.1)
  Requirement already satisfied: onnxruntime&lt;2.0.0,&gt;=1.2.0 in /home/user02/.local/lib/python3.8/site-packages (from nnoir-onnx) (1.12.0)
  Requirement already satisfied: zipp&gt;=0.5 in /home/user02/.local/lib/python3.8/site-packages (from importlib-metadata&lt;5,&gt;=4-&gt;nnoir-onnx) (3.8.1)
  Requirement already satisfied: typing-extensions&gt;=3.6.2.1 in /home/user02/.local/lib/python3.8/site-packages (from onnx&lt;1.12.0-&gt;nnoir-onnx) (4.3.0)
  Requirement already satisfied: flatbuffers in /home/user02/.local/lib/python3.8/site-packages (from onnxruntime&lt;2.0.0,&gt;=1.2.0-&gt;nnoir-onnx) (2.0)
  Requirement already satisfied: coloredlogs in /home/user02/.local/lib/python3.8/site-packages (from onnxruntime&lt;2.0.0,&gt;=1.2.0-&gt;nnoir-onnx) (15.0.1)
  Requirement already satisfied: packaging in /home/user02/.local/lib/python3.8/site-packages (from onnxruntime&lt;2.0.0,&gt;=1.2.0-&gt;nnoir-onnx) (21.3)
  Requirement already satisfied: sympy in /home/user02/.local/lib/python3.8/site-packages (from onnxruntime&lt;2.0.0,&gt;=1.2.0-&gt;nnoir-onnx) (1.10.1)
  Requirement already satisfied: humanfriendly&gt;=9.1 in /home/user02/.local/lib/python3.8/site-packages (from coloredlogs-&gt;onnxruntime&lt;2.0.0,&gt;=1.2.0-&gt;nnoir-onnx) (10.0)
  Requirement already satisfied: pyparsing!=3.0.5,&gt;=2.0.2 in /home/user02/.local/lib/python3.8/site-packages (from packaging-&gt;onnxruntime&lt;2.0.0,&gt;=1.2.0-&gt;nnoir-onnx) (3.0.9)
  Requirement already satisfied: mpmath&gt;=0.19 in /home/user02/.local/lib/python3.8/site-packages (from sympy-&gt;onnxruntime&lt;2.0.0,&gt;=1.2.0-&gt;nnoir-onnx) (1.2.1)
  user02@ubuntu:~/Downloads$ onnx2nnoir -o model.nnoir model.onnx
  onnx2nnoir: command not found
  user02@ubuntu:~/Downloads$ 
  
  </code></pre>
  <p>I have also tried <code>onnigiri</code> but similar errors are being displayed. Kindly let me know how to solve this.</p>