Getting error in installing tf2onnx on pip-CodePudding

I am trying to convert my .pb model to .onnx and for that I am installing tf2onnx using pip. However, doing that I keep getting following error

C:\Users\HC>pip install -U tf2onnx
Collecting tf2onnx
  Using cached tf2onnx-1.9.3-py3-none-any.whl (435 kB)
Collecting flatbuffers~=1.12
  Using cached flatbuffers-1.12-py2.py3-none-any.whl (15 kB)
Requirement already satisfied: numpy>=1.14.1 in c:\users\hc\appdata\local\programs\python\python310\lib\site-packages (from tf2onnx) (1.22.1)
Requirement already satisfied: requests in c:\users\hc\appdata\local\programs\python\python310\lib\site-packages (from tf2onnx) (2.27.1)
Requirement already satisfied: six in c:\users\hc\appdata\local\programs\python\python310\lib\site-packages (from tf2onnx) (1.16.0)
Collecting onnx>=1.4.1
  Using cached onnx-1.10.2.tar.gz (9.9 MB)
  Installing build dependencies ... done
  Getting requirements to build wheel ... error
  error: subprocess-exited-with-error

  × Getting requirements to build wheel did not run successfully.
  │ exit code: 1
  ╰─> [18 lines of output]
      Traceback (most recent call last):
        File "C:\Users\HC\AppData\Local\Programs\Python\Python310\lib\site-packages\pip\_vendor\pep517\in_process\_in_process.py", line 363, in <module>
          main()
        File "C:\Users\HC\AppData\Local\Programs\Python\Python310\lib\site-packages\pip\_vendor\pep517\in_process\_in_process.py", line 345, in main
          json_out['return_val'] = hook(**hook_input['kwargs'])
        File "C:\Users\HC\AppData\Local\Programs\Python\Python310\lib\site-packages\pip\_vendor\pep517\in_process\_in_process.py", line 130, in get_requires_for_build_wheel
          return hook(config_settings)
        File "C:\Users\HC\AppData\Local\Temp\pip-build-env-qij5_ixj\overlay\Lib\site-packages\setuptools\build_meta.py", line 162, in get_requires_for_build_wheel
          return self._get_build_requires(
        File "C:\Users\HC\AppData\Local\Temp\pip-build-env-qij5_ixj\overlay\Lib\site-packages\setuptools\build_meta.py", line 143, in _get_build_requires
          self.run_setup()
        File "C:\Users\HC\AppData\Local\Temp\pip-build-env-qij5_ixj\overlay\Lib\site-packages\setuptools\build_meta.py", line 267, in run_setup
          super(_BuildMetaLegacyBackend,
        File "C:\Users\HC\AppData\Local\Temp\pip-build-env-qij5_ixj\overlay\Lib\site-packages\setuptools\build_meta.py", line 158, in run_setup
          exec(compile(code, __file__, 'exec'), locals())
        File "setup.py", line 86, in <module>
          assert CMAKE, 'Could not find "cmake" executable!'
      AssertionError: Could not find "cmake" executable!
      [end of output]

  note: This error originates from a subprocess, and is likely not a problem with pip.
error: subprocess-exited-with-error

× Getting requirements to build wheel did not run successfully.
│ exit code: 1
╰─> See above for output.

note: This error originates from a subprocess, and is likely not a problem with pip.

Please can anyone guide how to tackle this

CodePudding user response：

AssertionError: Could not find "cmake" executable! indicates that pip couldn't find cmake. You should install it (https://cmake.org/download/) or add it to your PATH.

CodePudding user response：

As already stated, the problem is that cmake is not installed. However, you can avoid this problem entirely by using Python 3.9 or 3.8. pip can install pre-compiled onnx for those python versions.

See https://pypi.org/project/onnx/#files