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Running
on
Zero
File size: 1,068 Bytes
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# Copyright (c) Meta Platforms, Inc. and affiliates.
from bytelatent.data.iterators.abstract_iterator import (
PydanticIteratorState,
StatefulIterator,
)
from bytelatent.data.iterators.arrow_iterator import (
ArrowFileIterator,
ArrowFileIteratorState,
)
class LoopingIteratorState(PydanticIteratorState):
file_iterator_state: ArrowFileIteratorState
epoch: int
def build(self) -> "LoopingIterator":
return LoopingIterator(
file_iterator=self.file_iterator_state.build(),
epoch=self.epoch,
)
class LoopingIterator(StatefulIterator):
def __init__(self, file_iterator: ArrowFileIterator, epoch: int = -1):
self.file_iterator = file_iterator
self.epoch = epoch
def get_state(self):
return LoopingIteratorState(
file_iterator_state=self.file_iterator.get_state(), epoch=self.epoch
)
def create_iter(self):
while True:
self.epoch += 1
iterator = self.file_iterator.create_iter()
yield from iterator
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