fiftyone.core.utils.StaticBatcher

class documentation

class StaticBatcher(BaseChunkyBatcher): (source)

Constructor: StaticBatcher(iterable, batch_size, return_views, progress, ...)

Class for iterating over the elements of an iterable with a static batch size.

This class is often used in conjunction with a ProgressBar to keep the user appraised on the status of a long-running task.

Example usage:

import fiftyone.core.utils as fou

elements = range(int(1e7))

batcher = fou.StaticBatcher(elements, batch_size=10000)

for batch in batcher:
    print("batch size: %d" % len(batch))

batcher = fou.StaticBatcher(elements, batch_size=10000, progress=True)

with batcher:
    for batch in batcher:
        print("batch size: %d" % len(batch))

Parameters
iterable	an iterable to batch over. If `None`, the result of `next()` will be a batch size instead of a batch, and is an infinite iterator.
batch_size	size of batches to generate
return_views	whether to return each batch as a `fiftyone.core.view.DatasetView`. Only applicable when the iterable is a `fiftyone.core.collections.SampleCollection`
progress	whether to render a progress bar tracking the consumption of the batches (True/False), use the default value `fiftyone.config.show_progress_bars` (None), or a progress callback function to invoke instead
total	the length of `iterable`. Only applicable when `progress=True`. If not provided, it is computed via `len(iterable)`, if possible
transform_fn	a transform function to apply to each item of the batch

Method	`__init__`	Undocumented
Instance Variable	`batch_size`	Undocumented
Method	`_compute_batch_size`	Return next batch size. Concrete classes must implement.

Inherited from BaseChunkyBatcher:

Method	`__next__`	Undocumented
Instance Variable	`_last_batch_size`	Undocumented

Inherited from BaseBatcher (via BaseChunkyBatcher):

Method	`__enter__`	Undocumented
Method	`__exit__`	Undocumented
Method	`__iter__`	Undocumented
Instance Variable	`iterable`	Undocumented
Instance Variable	`_in_context`	Undocumented
Instance Variable	`_iter`	Undocumented
Instance Variable	`_last_offset`	Undocumented
Instance Variable	`_num_samples`	Undocumented
Instance Variable	`_pb`	Undocumented
Instance Variable	`_render_progress`	Undocumented
Instance Variable	`_transform_fn`	Undocumented

def __init__(self, iterable, batch_size, return_views=False, progress=False, total=None, transform_fn=None): (source) ¶

overrides fiftyone.core.utils.BaseBatcher.__init__

Undocumented

batch_size = (source) ¶

Undocumented

def _compute_batch_size(self): (source) ¶

overrides fiftyone.core.utils.BaseChunkyBatcher._compute_batch_size

Return next batch size. Concrete classes must implement.