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translation.py
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translation.py
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import argparse, os, sys, datetime, glob, importlib
from omegaconf import OmegaConf
import numpy as np
from PIL import Image
import torch
import torchvision
from torch.utils.data import random_split, DataLoader, Dataset
import pytorch_lightning as pl
from pytorch_lightning import seed_everything
from pytorch_lightning.trainer import Trainer
from pytorch_lightning.callbacks import ModelCheckpoint, Callback
from pytorch_lightning.utilities.distributed import rank_zero_only
def get_parser(**parser_kwargs):
def str2bool(v):
if isinstance(v, bool):
return v
if v.lower() in ("yes", "true", "t", "y", "1"):
return True
elif v.lower() in ("no", "false", "f", "n", "0"):
return False
else:
raise argparse.ArgumentTypeError("Boolean value expected.")
parser = argparse.ArgumentParser(**parser_kwargs)
parser.add_argument(
"-n",
"--name",
type=str,
const=True,
default="",
nargs="?",
help="postfix for logdir",
)
parser.add_argument(
"-r",
"--resume",
type=str,
const=True,
default="",
nargs="?",
help="resume from logdir or checkpoint in logdir",
)
parser.add_argument(
"-b",
"--base",
nargs="*",
metavar="base_config.yaml",
help="paths to base configs. Loaded from left-to-right. "
"Parameters can be overwritten or added with command-line options of the form `--key value`.",
default=list(),
)
parser.add_argument(
"-t",
"--train",
type=str2bool,
const=True,
default=False,
nargs="?",
help="train",
)
parser.add_argument(
"--no-test",
type=str2bool,
const=True,
default=False,
nargs="?",
help="disable test",
)
parser.add_argument("-p", "--project", help="name of new or path to existing project")
parser.add_argument(
"-d",
"--debug",
type=str2bool,
nargs="?",
const=True,
default=False,
help="enable post-mortem debugging",
)
parser.add_argument(
"-s",
"--seed",
type=int,
default=23,
help="seed for seed_everything",
)
return parser
def nondefault_trainer_args(opt):
parser = argparse.ArgumentParser()
parser = Trainer.add_argparse_args(parser)
args = parser.parse_args([])
return sorted(k for k in vars(args) if getattr(opt, k) != getattr(args, k))
def get_obj_from_str(string, reload=False):
module, cls = string.rsplit(".", 1)
if reload:
module_imp = importlib.import_module(module)
importlib.reload(module_imp)
return getattr(importlib.import_module(module, package=None), cls)
def instantiate_from_config(config):
if not "target" in config:
raise KeyError("Expected key `target` to instantiate.")
return get_obj_from_str(config["target"])(**config.get("params", dict()))
class DataModuleFromConfig(pl.LightningDataModule):
def __init__(self, batch_size, train=None, validation=None, test=None,
num_workers=None):
super().__init__()
self.batch_size = batch_size
self.dataset_configs = dict()
self.num_workers = num_workers if num_workers is not None else batch_size*2
if train is not None:
self.dataset_configs["train"] = train
self.train_dataloader = self._train_dataloader
if validation is not None:
self.dataset_configs["validation"] = validation
self.val_dataloader = self._val_dataloader
if test is not None:
self.dataset_configs["test"] = test
self.test_dataloader = self._test_dataloader
def prepare_data(self):
for data_cfg in self.dataset_configs.values():
instantiate_from_config(data_cfg)
def setup(self, stage=None):
self.datasets = dict(
(k, instantiate_from_config(self.dataset_configs[k]))
for k in self.dataset_configs)
def _train_dataloader(self):
return DataLoader(self.datasets["train"], batch_size=self.batch_size,
num_workers=self.num_workers, shuffle=True)
def _val_dataloader(self):
return DataLoader(self.datasets["validation"],
batch_size=self.batch_size,
num_workers=self.num_workers)
def _test_dataloader(self):
return DataLoader(self.datasets["test"], batch_size=self.batch_size,
num_workers=self.num_workers)
class SetupCallback(Callback):
def __init__(self, resume, now, logdir, ckptdir, cfgdir, config, lightning_config):
super().__init__()
self.resume = resume
self.now = now
self.logdir = logdir
self.ckptdir = ckptdir
self.cfgdir = cfgdir
self.config = config
self.lightning_config = lightning_config
def on_pretrain_routine_start(self, trainer, pl_module):
if trainer.global_rank == 0:
# Create logdirs and save configs
os.makedirs(self.logdir, exist_ok=True)
os.makedirs(self.ckptdir, exist_ok=True)
os.makedirs(self.cfgdir, exist_ok=True)
print("Project config")
print(self.config.pretty())
OmegaConf.save(self.config,
os.path.join(self.cfgdir, "{}-project.yaml".format(self.now)))
print("Lightning config")
print(self.lightning_config.pretty())
OmegaConf.save(OmegaConf.create({"lightning": self.lightning_config}),
os.path.join(self.cfgdir, "{}-lightning.yaml".format(self.now)))
else:
# ModelCheckpoint callback created log directory --- remove it
if not self.resume and os.path.exists(self.logdir):
dst, name = os.path.split(self.logdir)
dst = os.path.join(dst, "child_runs", name)
os.makedirs(os.path.split(dst)[0], exist_ok=True)
try:
os.rename(self.logdir, dst)
except FileNotFoundError:
pass
@rank_zero_only
def on_train_end(self, trainer, pl_module):
# trainer only saves last step if validation_step is not implemented
# but we want to save in that case, too
should_activate = trainer.is_overridden('validation_step')
if should_activate:
checkpoint_callbacks = [c for c in trainer.callbacks if isinstance(c, ModelCheckpoint)]
[c.on_validation_end(trainer, trainer.get_model()) for c in checkpoint_callbacks]
class ImageLogger(Callback):
def __init__(self, batch_frequency, max_images, clamp=True):
super().__init__()
self.batch_freq = batch_frequency
self.max_images = max_images
self.logger_log_images = {
pl.loggers.WandbLogger: self._wandb,
pl.loggers.TestTubeLogger: self._testtube,
}
self.log_steps = [2 ** n for n in range(int(np.log2(self.batch_freq)) + 1)]
self.clamp = clamp
@rank_zero_only
def _wandb(self, pl_module, images, batch_idx, split):
grids = dict()
for k in images:
grid = torchvision.utils.make_grid(images[k])
grids[f"{split}/{k}"] = wandb.Image(grid)
pl_module.logger.experiment.log(grids)
@rank_zero_only
def _testtube(self, pl_module, images, batch_idx, split):
for k in images:
grid = torchvision.utils.make_grid(images[k])
grid = (grid+1.0)/2.0 # -1,1 -> 0,1; c,h,w
tag = f"{split}/{k}"
pl_module.logger.experiment.add_image(
tag, grid,
global_step=pl_module.global_step)
@rank_zero_only
def log_local(self, save_dir, split, images,
global_step, current_epoch, batch_idx):
root = os.path.join(save_dir, "images", split)
for k in images:
grid = torchvision.utils.make_grid(images[k], nrow=4)
grid = (grid+1.0)/2.0 # -1,1 -> 0,1; c,h,w
grid = grid.transpose(0,1).transpose(1,2).squeeze(-1)
grid = grid.numpy()
grid = (grid*255).astype(np.uint8)
filename = "{}_gs-{:06}_e-{:06}_b-{:06}.png".format(
k,
global_step,
current_epoch,
batch_idx)
path = os.path.join(root, filename)
os.makedirs(os.path.split(path)[0], exist_ok=True)
Image.fromarray(grid).save(path)
def log_img(self, pl_module, batch, batch_idx, split="train"):
if (self.check_frequency(batch_idx) and # batch_idx % self.batch_freq == 0
hasattr(pl_module, "log_images") and
callable(pl_module.log_images)):
logger = type(pl_module.logger)
is_train = pl_module.training
if is_train:
pl_module.eval()
with torch.no_grad():
images = pl_module.log_images(batch, split=split)
for k in images:
N = min(images[k].shape[0], self.max_images)
images[k] = images[k][:N]
if isinstance(images[k], torch.Tensor):
images[k] = images[k].detach().cpu()
if self.clamp:
images[k] = torch.clamp(images[k], -1., 1.)
self.log_local(pl_module.logger.save_dir, split, images,
pl_module.global_step, pl_module.current_epoch, batch_idx)
logger_log_images = self.logger_log_images.get(logger, lambda *args, **kwargs: None)
logger_log_images(pl_module, images, pl_module.global_step, split)
if is_train:
pl_module.train()
def check_frequency(self, batch_idx):
if (batch_idx % self.batch_freq) == 0 or (batch_idx in self.log_steps):
try:
self.log_steps.pop(0)
except IndexError:
pass
return True
return False
def on_train_batch_end(self, trainer, pl_module, batch, batch_idx, dataloader_idx):
self.log_img(pl_module, batch, batch_idx, split="train")
def on_validation_batch_end(self, trainer, pl_module, batch, batch_idx, dataloader_idx):
self.log_img(pl_module, batch, batch_idx, split="val")
if __name__ == "__main__":
# custom parser to specify config files, train, test and debug mode,
# postfix, resume.
# `--key value` arguments are interpreted as arguments to the trainer.
# `nested.key=value` arguments are interpreted as config parameters.
# configs are merged from left-to-right followed by command line parameters.
# model:
# base_learning_rate: float
# target: path to lightning module
# params:
# key: value
# data:
# target: translation.DataModuleFromConfig
# params:
# batch_size: int
# train:
# target: path to train dataset
# params:
# key: value
# validation:
# target: path to validation dataset
# params:
# key: value
# test:
# target: path to test dataset
# params:
# key: value
# lightning: (optional, has sane defaults and can be specified on cmdline)
# trainer:
# additional arguments to trainer
# logger:
# logger to instantiate
# modelcheckpoint:
# modelcheckpoint to instantiate
# callbacks:
# callback1:
# target: importpath
# params:
# key: value
now = datetime.datetime.now().strftime("%Y-%m-%dT%H-%M-%S")
# add cwd for convenience and to make classes in this file available when
# running as `python translation.py`
# (in particular `translation.DataModuleFromConfig`)
sys.path.append(os.getcwd())
parser = get_parser()
parser = Trainer.add_argparse_args(parser)
opt, unknown = parser.parse_known_args()
if opt.name and opt.resume:
raise ValueError(
"-n/--name and -r/--resume cannot be specified both."
"If you want to resume training in a new log folder, "
"use -n/--name in combination with --resume_from_checkpoint"
)
if opt.resume:
if not os.path.exists(opt.resume):
raise ValueError("Cannot find {}".format(opt.resume))
if os.path.isfile(opt.resume):
paths = opt.resume.split("/")
idx = len(paths)-paths[::-1].index("logs")+1
logdir = "/".join(paths[:idx])
ckpt = opt.resume
else:
assert os.path.isdir(opt.resume), opt.resume
logdir = opt.resume.rstrip("/")
ckpt = os.path.join(logdir, "checkpoints", "last.ckpt")
opt.resume_from_checkpoint = ckpt
base_configs = sorted(glob.glob(os.path.join(logdir, "configs/*.yaml")))
opt.base = base_configs+opt.base
_tmp = logdir.split("/")
nowname = _tmp[_tmp.index("logs")+1]
else:
if opt.name:
name = "_"+opt.name
elif opt.base:
cfg_fname = os.path.split(opt.base[0])[-1]
cfg_name = os.path.splitext(cfg_fname)[0]
name = "_"+cfg_name
else:
name = ""
nowname = now+name
logdir = os.path.join("logs", nowname)
ckptdir = os.path.join(logdir, "checkpoints")
cfgdir = os.path.join(logdir, "configs")
seed_everything(opt.seed)
try:
# init and save configs
configs = [OmegaConf.load(cfg) for cfg in opt.base]
cli = OmegaConf.from_dotlist(unknown)
config = OmegaConf.merge(*configs, cli)
lightning_config = config.pop("lightning", OmegaConf.create())
# merge trainer cli with config
trainer_config = lightning_config.get("trainer", OmegaConf.create())
# default to ddp
trainer_config["distributed_backend"] = "ddp"
for k in nondefault_trainer_args(opt):
trainer_config[k] = getattr(opt, k)
trainer_opt = argparse.Namespace(**trainer_config)
lightning_config.trainer = trainer_config
# model
model = instantiate_from_config(config.model)
# trainer and callbacks
trainer_kwargs = dict()
# default logger configs
# NOTE wandb < 0.10.0 interferes with shutdown
# wandb >= 0.10.0 seems to fix it but still interferes with pudb
# debugging (wrongly sized pudb ui)
# thus prefer testtube for now
default_logger_cfgs = {
"wandb": {
"target": "pytorch_lightning.loggers.WandbLogger",
"params": {
"name": nowname,
"save_dir": logdir,
"offline": opt.debug,
"id": nowname,
}
},
"testtube": {
"target": "pytorch_lightning.loggers.TestTubeLogger",
"params": {
"name": "testtube",
"save_dir": logdir,
}
},
}
default_logger_cfg = default_logger_cfgs["testtube"]
logger_cfg = lightning_config.logger or OmegaConf.create()
logger_cfg = OmegaConf.merge(default_logger_cfg, logger_cfg)
trainer_kwargs["logger"] = instantiate_from_config(logger_cfg)
# modelcheckpoint - use TrainResult/EvalResult(checkpoint_on=metric) to
# specify which metric is used to determine best models
default_modelckpt_cfg = {
"target": "pytorch_lightning.callbacks.ModelCheckpoint",
"params": {
"filepath": os.path.join(ckptdir, "{epoch:06}"),
"verbose": True,
"save_last": True,
"save_top_k": 3,
"period": 0,
}
}
modelckpt_cfg = lightning_config.modelcheckpoint or OmegaConf.create()
modelckpt_cfg = OmegaConf.merge(default_modelckpt_cfg, modelckpt_cfg)
trainer_kwargs["checkpoint_callback"] = instantiate_from_config(modelckpt_cfg)
# add callback which sets up log directory
default_callbacks_cfg = {
"setup_callback": {
"target": "translation.SetupCallback",
"params": {
"resume": opt.resume,
"now": now,
"logdir": logdir,
"ckptdir": ckptdir,
"cfgdir": cfgdir,
"config": config,
"lightning_config": lightning_config,
}
},
"image_logger": {
"target": "translation.ImageLogger",
"params": {
"batch_frequency": 250,
"max_images": 4,
"clamp": True
}
},
}
callbacks_cfg = lightning_config.callbacks or OmegaConf.create()
callbacks_cfg = OmegaConf.merge(default_callbacks_cfg, callbacks_cfg)
trainer_kwargs["callbacks"] = [instantiate_from_config(callbacks_cfg[k]) for k in callbacks_cfg]
trainer = Trainer.from_argparse_args(trainer_opt, **trainer_kwargs)
# data
data = instantiate_from_config(config.data)
# NOTE according to https://pytorch-lightning.readthedocs.io/en/latest/datamodules.html
# calling these ourselves should not be necessary but it is.
# lightning still takes care of proper multiprocessing though
data.prepare_data()
data.setup()
# configure learning rate
bs, base_lr, ngpu = config.data.params.batch_size, config.model.base_learning_rate, len(
lightning_config.trainer.gpus.strip(",").split(','))
accumulate_grad_batches = lightning_config.trainer.accumulate_grad_batches or 1
model.learning_rate = accumulate_grad_batches * ngpu * bs * base_lr
print("Setting learning rate to {:.2e} = {} (accumulate_grad_batches) * {} (num_gpus) * {} (batchsize) * {:.2e} (base_lr)".format(
model.learning_rate, accumulate_grad_batches, ngpu, bs, base_lr))
# allow checkpointing via USR1
def melk(*args, **kwargs):
# run all checkpoint hooks
if trainer.global_rank == 0:
print("Summoning checkpoint callbacks.")
checkpoint_callbacks = [c for c in trainer.callbacks if isinstance(c, ModelCheckpoint)]
[c.on_validation_end(trainer, trainer.get_model()) for c in checkpoint_callbacks]
# allow debugging via USR2
def divein(*args, **kwargs):
if trainer.global_rank == 0:
import pudb; pudb.set_trace()
import signal
signal.signal(signal.SIGUSR1, melk)
signal.signal(signal.SIGUSR2, divein)
# run
if opt.train:
trainer.fit(model, data)
if not opt.no_test and not trainer.interrupted:
trainer.test(model, data)
except Exception:
if opt.debug and trainer.global_rank==0:
try:
import pudb as debugger
except ImportError:
import pdb as debugger
debugger.post_mortem()
melk()
raise
finally:
# move newly created debug project to debug_runs
if opt.debug and not opt.resume and trainer.global_rank==0:
dst, name = os.path.split(logdir)
dst = os.path.join(dst, "debug_runs", name)
os.makedirs(os.path.split(dst)[0], exist_ok=True)
os.rename(logdir, dst)