Add Tanh, Range and Pow OpCodeGenerators and fix assert when dir exists

[alealv]

No description provided.

[Z223I]

@alealv Here is the assert fix:
Change /home/username/venvonnx/lib/python3.8/site-packages/onnx_pytorch/code_gen.py
You already have a soln. For others out there...
def gen(onnx_model,
output_dir,
overwrite=False,
tensor_inplace=False,
simplify_names=False,
continue_on_error=False):
kwargs = {
"output_dir": output_dir,
"simplify_names": simplify_names,
"tensor_inplace": tensor_inplace,
"continue_on_error": continue_on_error,
}
if type(onnx_model) == onnx.ModelProto:
kwargs["onnx_model"] = onnx_model
else:

        if os.path.exists(output_dir):
            pathExists = True
            print(f"{output_dir} exists.")
        else:
            pathExists = False
            print(f"{output_dir} does not exists.")
        print(f"overwrite: {overwrite}")

        assert os.path.exists(
            onnx_model), f"ONNX model {onnx_model} does not exist."
        assert os.path.isfile(onnx_model), f"{onnx_model} is not a file."

        if pathExists and overwrite != True:
            print(f"{output_dir} exists and overwrite is not True.")

        if os.path.exists(output_dir):
            assert overwrite, f"{output_dir} exists and overwrite is not True."

        assert os.path.isdir(output_dir), f"{output_dir} is not directory."
        kwargs["onnx_model"] = onnx.load(onnx_model)
    if overwrite:
        shutil.rmtree(output_dir, ignore_errors=True)
        os.makedirs(output_dir)
    ModelCodeGenerator(**kwargs).run()

[fumihwh]

@alealv Thanks for contribution.
Maybe conflict with earlier PR, just wait to merge.

[alealv]

Sorry for the late reply. I didn't get your answer, what do you want me to change?

I just rebase to master.

[fumihwh]

@alealv Could you add test cases for pow and range op?