Attribute error _enter_ when running int8 compilation

[harishprabhala]

I am getting this error while compiling for int8. The same code works fine for FP32 and FP16

[05/31/2022-05:46:12] [TRT] [E] 1: Unexpected exception 
Traceback (most recent call last):
  File "./onnx_to_tensorrt.py", line 218, in <module>
    main()
  File "./onnx_to_tensorrt.py", line 213, in main
    with builder.build_engine(network, config) as engine, open(args.output, "wb") as f:
AttributeError: __enter__