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trainval.py
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trainval.py
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from haven import haven_chk as hc
from haven import haven_results as hr
from haven import haven_utils as hu
import torch
import torchvision
import tqdm
import pandas as pd
import pprint
import itertools
import os
import pylab as plt
import exp_configs
import time
import numpy as np
from src import models
from src import datasets
from src import utils as ut
import argparse
from torch.utils.data import sampler
from torch.utils.data.sampler import RandomSampler
from torch.backends import cudnn
from torch.nn import functional as F
from torch.utils.data import DataLoader
cudnn.benchmark = True
def trainval(exp_dict, savedir_base, datadir, reset=False, num_workers=0):
# bookkeepting stuff
# ==================
pprint.pprint(exp_dict)
exp_id = hu.hash_dict(exp_dict)
savedir = os.path.join(savedir_base, exp_id)
if reset:
hc.delete_and_backup_experiment(savedir)
os.makedirs(savedir, exist_ok=True)
hu.save_json(os.path.join(savedir, "exp_dict.json"), exp_dict)
print("Experiment saved in %s" % savedir)
# Dataset
# ==================
# train set
train_set = datasets.get_dataset(dataset_dict=exp_dict["dataset"],
split="train",
datadir=datadir,
exp_dict=exp_dict,
dataset_size=exp_dict['dataset_size'])
# val set
val_set = datasets.get_dataset(dataset_dict=exp_dict["dataset"],
split="val",
datadir=datadir,
exp_dict=exp_dict,
dataset_size=exp_dict['dataset_size'])
val_sampler = torch.utils.data.SequentialSampler(val_set)
val_loader = DataLoader(val_set,
sampler=val_sampler,
batch_size=1,
collate_fn=ut.collate_fn,
num_workers=num_workers)
# Model
# ==================
model = models.get_model(model_dict=exp_dict['model'],
exp_dict=exp_dict,
train_set=train_set).cuda()
# model.opt = optimizers.get_optim(exp_dict['opt'], model)
model_path = os.path.join(savedir, "model.pth")
score_list_path = os.path.join(savedir, "score_list.pkl")
if os.path.exists(score_list_path):
# resume experiment
model.load_state_dict(hu.torch_load(model_path))
score_list = hu.load_pkl(score_list_path)
s_epoch = score_list[-1]['epoch'] + 1
else:
# restart experiment
score_list = []
s_epoch = 0
# Train & Val
# ==================
print("Starting experiment at epoch %d" % (s_epoch))
vis_loader = DataLoader(val_set, shuffle=False, batch_size=1, num_workers=num_workers,
collate_fn=ut.collate_fn)
train_sampler = torch.utils.data.RandomSampler(
train_set, replacement=True, num_samples=2*len(val_set))
train_loader = DataLoader(train_set,
sampler=train_sampler,
collate_fn=ut.collate_fn,
batch_size=exp_dict["batch_size"],
drop_last=True, num_workers=num_workers)
for e in range(s_epoch, exp_dict['max_epoch']):
# Validate only at the start of each cycle
score_dict = {}
# Train the model
train_dict = model.train_on_loader(train_loader)
# Validate and Visualize the model
val_dict = model.val_on_loader(val_loader,
savedir_images=os.path.join(savedir, "images"),
n_images=3)
score_dict.update(val_dict)
# model.vis_on_loader(
# vis_loader, savedir=os.path.join(savedir, "images"))
# Get new score_dict
score_dict.update(train_dict)
score_dict["epoch"] = len(score_list)
# Add to score_list and save checkpoint
score_list += [score_dict]
# Report & Save
score_df = pd.DataFrame(score_list)
print("\n", score_df.tail(), "\n")
hu.torch_save(model_path, model.get_state_dict())
hu.save_pkl(score_list_path, score_list)
print("Checkpoint Saved: %s" % savedir)
# Save Best Checkpoint
if e == 0 or (score_dict.get("val_score", 0) > score_df["val_score"][:-1].fillna(0).max()):
hu.save_pkl(os.path.join(
savedir, "score_list_best.pkl"), score_list)
hu.torch_save(os.path.join(savedir, "model_best.pth"),
model.get_state_dict())
print("Saved Best: %s" % savedir)
print('Experiment completed et epoch %d' % e)
if __name__ == "__main__":
parser = argparse.ArgumentParser()
parser.add_argument('-e', '--exp_group_list', nargs="+")
parser.add_argument('-sb', '--savedir_base', required=True)
parser.add_argument('-d', '--datadir', required=True)
parser.add_argument("-r", "--reset", default=0, type=int)
parser.add_argument("-ei", "--exp_id", default=None)
parser.add_argument("-j", "--run_jobs", default=0, type=int)
parser.add_argument("-nw", "--num_workers", type=int, default=0)
args = parser.parse_args()
# Collect experiments
# ===================
if args.exp_id is not None:
# select one experiment
savedir = os.path.join(args.savedir_base, args.exp_id)
exp_dict = hu.load_json(os.path.join(savedir, "exp_dict.json"))
exp_list = [exp_dict]
else:
# select exp group
exp_list = []
for exp_group_name in args.exp_group_list:
exp_list += exp_configs.EXP_GROUPS[exp_group_name]
# Run experiments
# ===============
if args.run_jobs:
import usr_configs as uc
uc.run_jobs(exp_list, args.savedir_base, args.datadir)
else:
for exp_dict in exp_list:
# do trainval
trainval(exp_dict=exp_dict,
savedir_base=args.savedir_base,
datadir=args.datadir,
reset=args.reset,
num_workers=args.num_workers)