[tools] Enhance tflite tools

[YongseopKim]

There are some utils on tools for tflite models. But, I'd like to add some features like

• print graph on console
• make tools ease searching/finding
• show available constant values like slide_slice

After concrete goals, I'll make new issues separately.

/cc @chunseoklee @hseok-oh

[YongseopKim]

(as-is) tflitefile_tool -> (to-be) model_tool

• the only tflite supports now
• other model types support in the future

tflitefile_tool revised

• modules: IR, parser, [text|graph|value]printer, saver, finder, ...

todos

• [x] Arrange modules
• [x] Separate model_parser from tflite

[YongseopKim]

as-is

~/Works/ONE/tools/tflitefile_tool(pr/tools/arrange_tflitefile_tool ✗) tree -L 2
.
├── ir
│   ├── graph_stats.py
│   ├── __init__.py
│   ├── operator_wrapping.py
│   └── tensor_wrapping.py
├── model_parser.py
├── parser
│   ├── __init__.py
│   ├── model_parser.py
│   └── operator_parser.py
├── printer
│   ├── __init__.py
│   ├── operator_printer.py
│   ├── option_printer.py
│   ├── subgraph_printer.py
│   └── tensor_printer.py
├── README.md
├── requirements.txt
├── saver
│   ├── config_saver.py
│   ├── __init__.py
│   └── model_saver.py
├── select_operator.py
└── tflite
    ├── AbsOptions.py
    ├── ...

to-be

~/Works/ONE/tools/tflitefile_tool(pr/tools/arrange_tflitefile_tool ✗) tree -L 2
.
├── ir
│   ├── model
│   ├── subgraph
│   ├── operator
│   ├── option
│   └── tensor; +const value
├── main.py
├── parser
│   ├── tflite_parser.py; inherits to below functions by tflite API
│   ├── other_parser.py; inherits to below functions by other API
│   ├── model_parser.py
│   ├── sungraph_parser.py
│   ├── tensor_parser.py
│   └── operator_parser.py
├── printer
│   ├── printer.py; below functions inherent to this function
│   ├── stdout_printer.py
│   ├── csv_printer.py
│   ├── dot_printer.py
│   └── graph_printer.py; this would be quite difficult
├── README.md
├── requirements.txt
├── saver
│   ├── config_saver.py
│   └── model_saver.py
├── select_operator.py
└── tflite
    ├── AbsOptions.py
    ├── ...

[YongseopKim]

https://github.com/Samsung/ONE/pull/8163

LGTM

@YongseopKim We may need unittest for better review.

Let's support unittest.

[YongseopKim]

After chatting with @mhs4670go , I figure out the necessity of what the final goal is.

• tflitefile_tools could be nn model tools -> could support other types of nn models that use python apis
• ascii graph printing could be a kind of diff tool -> could show the diff of nodes or attributes of nodes
• could support features easily like search, save(multiple save file types), and so on.

[YongseopKim]

printer

• [ ] remove saver/
• [ ] introduce csv, dot printer

features

• [ ] introduce printing buffer
• [ ] introduce search(or find)

...

• [ ] OpTypesCount -> from collections import Counter
• [ ] Adds negative tests

https://github.com/Samsung/ONE/pull/8187 @hseok-oh

It's better to add negative test later.