# File Structure

## Files
* `helper` is a module that contains helper functions for the project.
  - `constant.py` contains helper functions for constant related operations.
  - `finders.py` contains helper functions for finding nodes and attributes. All of those functions are read-only for graph.
  - `kngraph.py` contains helper functions for KNGraph related operations. KNGraph is a graph structure that is used for pattern matching and other optimizations.
  - `meta.py` contains helper functions for model meta information.
  - `onnx_tools.py` contains helper functions for onnx related graph modification tools.
  - `misc.py` constains helper functions for other operations.
  - `update_opset_{i}.py` contains helper functions for updating opset from {i} to {i+1}.