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tqdm_utils.py
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tqdm_utils.py
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# coding=utf-8
# Copyright 2019 The TensorFlow Datasets Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Wrapper around tqdm.
"""
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
import contextlib
from tqdm import auto as tqdm_lib
class EmptyTqdm(object):
"""Dummy tqdm which doesn't do anything."""
def __init__(self, *args, **kwargs): # pylint: disable=unused-argument
self._iterator = args[0] if args else None
def __iter__(self):
return iter(self._iterator)
def __getattr__(self, _):
"""Return empty function."""
def empty_fn(*args, **kwargs): # pylint: disable=unused-argument
return
return empty_fn
def __enter__(self):
return self
def __exit__(self, type_, value, traceback):
return
_active = True
def tqdm(*args, **kwargs):
if _active:
return tqdm_lib.tqdm(*args, **kwargs)
else:
return EmptyTqdm(*args, **kwargs)
def async_tqdm(*args, **kwargs):
if _active:
return _async_tqdm(*args, **kwargs)
else:
return EmptyTqdm(*args, **kwargs)
def disable_progress_bar():
"""Disabled Tqdm progress bar.
Usage:
tfds.disable_progress_bar()
"""
# Replace tqdm
global _active
_active = False
@contextlib.contextmanager
def _async_tqdm(*args, **kwargs):
"""Wrapper around Tqdm which can be updated in threads.
Usage:
```
with utils.async_tqdm(...) as pbar:
# pbar can then be modified inside a thread
# pbar.update_total(3)
# pbar.update()
```
Args:
*args: args of tqdm
**kwargs: kwargs of tqdm
Yields:
pbar: Async pbar which can be shared between threads.
"""
with tqdm_lib.tqdm(*args, **kwargs) as pbar:
pbar = _TqdmPbarAsync(pbar)
yield pbar
pbar.clear() # pop pbar from the active list of pbar
print() # Avoid the next log to overlapp with the bar
class _TqdmPbarAsync(object):
"""Wrapper around Tqdm pbar which be shared between thread."""
_tqdm_bars = []
def __init__(self, pbar):
self._lock = tqdm_lib.tqdm.get_lock()
self._pbar = pbar
self._tqdm_bars.append(pbar)
def update_total(self, n=1):
"""Increment total pbar value."""
with self._lock:
self._pbar.total += n
self.refresh()
def update(self, n=1):
"""Increment current value."""
with self._lock:
self._pbar.update(n)
self.refresh()
def refresh(self):
"""Refresh all."""
for pbar in self._tqdm_bars:
pbar.refresh()
def clear(self):
"""Remove the tqdm pbar from the update."""
self._tqdm_bars.pop()