A simple and well designed structure is essential for any Deep Learning project, so after a lot of practice and contributing in tensorflow projects here's a tensorflow project template that combines simplcity, best practice for folder structure and good OOP design. The main idea is that there's much stuff you do every time you start your tensorflow project so wrapping all this shared stuff will help you to change just the core idea everytime you start a new tensorflow project.
So here's a simple tensorflow template that help you get into your main project faster and just focus on your core (Model, Training, ...etc)
In a nutshell here's how to use this template, so for example assume you want to implement VGG model so you should do the following:
- In models folder create a class named VGG that inherit the "base_model" class
class VGGModel(BaseModel):
def __init__(self, config):
super(VGGModel, self).__init__(config)
#call the build_model and init_saver functions.
self.build_model()
self.init_saver() - Override these two functions "build_model" where you implement the vgg model, and "init_saver" where you define a tensorflow saver, then call them in the initalizer.
def build_model(self):
# here you build the tensorflow graph of any model you want and also define the loss.
pass
def init_saver(self):
#here you initalize the tensorflow saver that will be used in saving the checkpoints.
self.saver = tf.train.Saver(max_to_keep=self.config.max_to_keep)- In trainers folder create a VGG trainer that inherit from "base_train" class
class VGGTrainer(BaseTrain):
def __init__(self, sess, model, data, config, logger):
super(VGGTrainer, self).__init__(sess, model, data, config, logger)- Override these two functions "train_step", "train_epoch" where you write the logic of the training process
def train_epoch(self):
"""
implement the logic of epoch:
-loop ever the number of iteration in the config and call teh train step
-add any summaries you want using the sammary
"""
pass
def train_step(self):
"""
implement the logic of the train step
- run the tensorflow session
- return any metrics you need to summarize
"""
pass- In main file you create the session and create instance of the following objects "Model", "Logger", "Data_Generator", "Trainer", and config
sess = tf.Session()
# create instance of the model you want
model = VGGModel(config)
# create your data generator
data = DataGenerator(config)
# create tensorboard logger
logger = Logger(sess, config)- Pass the all these objects to the trainer object, and start your training by calling "trainer.train()"
trainer = VGGTrainer(sess, model, data, config, logger)
# here you train your model
trainer.train()You will a template file and a simple example in the model and trainer folder that shows you how to try your first model simply.
├── base
│ ├── base_model.py - this file contains the abstract class of the model.
│ └── ease_train.py - this file contains the abstract class of the trainer.
│
│
├── model -This folder contains any model of your project.
│ └── example_model.py
│
│
├── trainer -this folder contains trainers of your project.
│ └── example_trainer.py
│
├── mains - here's the main/s of your project (you may need more than one main.
│
│
├── data _loader
│ └── data_generator.py - here's the data_generator that responsible for all data handling.
│
└── utils
├── logger.py
└── any_other_utils_you_need
-
Base model is an abstract class that must be Inherited by any model you create, the idea behind this is that there's much shared stuff between all models. The base model contains:
- Save -This function to save a checkpoint to the desk.
- Load -This function to load a checkpoint from the desk.
- Cur_epoch, Global_step counters -These variables to keep track of the curerent epoch and global step.
- Init_Saver An abstract function to inialize the saver used for saving and loading the checkpoint, Note: override this function in the model you want to implement.
- Build_model Here's an abstract function to define the model, Note: override this function in the model you want to implement.
-
Here's where you implement your model. So you should :
- Create your model class and Inherit the base_model class
- override "build_model" where you write the tensorflow model you want
- override "init_save" where you create a tensorflow saver to use it to save and load checkpoint
- call the "build_model" and "init_saver" in the initalizer.
- Base trainer is an abstract class that just wrap the training process.
-
Here's what you shoulf implement in your trainer.
- Create your trainer class and Inherit the base_trainer class.
- override these two functions "train_step", "train_epoch" where you implement the training process of each step and each epoch.
These class is responsible for all data handling and processing and provide an easy interface that can be used by the trainer.
This class is responsible for the tensorboard summary, in your trainer create a dictionary of all tensorflow variables you want to summarize then pass this dictionary to logger.summarize().
I use Json as configuration method and then parse it, so write all configs you want then parse it using "utils/config/process_config" and pass this configuration object to all other objects.
Here's where you combine all previous part.
- Parse the config file.
- Create a tensorflow session.
- Create an instance of "Model", "Data_Generator" and "Logger" and parse the config to all of them.
- Create an instance of "Trainer" and pass all previous objects to it.
- Now you can train your model by calling "Trainer.train()"
- Replace the data loader part with new tensorflow dataset API.
Any kind of enhancement, or contribution is welcomed.
Thanks for my colleague Mo'men Abdelrazek for contributing in this work. and thanks for Mohamed Zahran for the review.