40 lines
1.3 KiB
Python
40 lines
1.3 KiB
Python
# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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#
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class IterableChunkedFile:
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"""File object chunk iterator using yield.
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Represents a local file as an iterable object by splitting the file
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into chunks. Avoids the file from being completely loaded into memory.
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"""
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def __init__(self, file_object, chunk_size=1024 * 1024 * 128, close=False):
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self.close_after_read = close
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self.file_object = file_object
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self.chunk_size = chunk_size
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def __iter__(self):
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try:
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while True:
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data = self.file_object.read(self.chunk_size)
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if not data:
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break
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yield data
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finally:
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if self.close_after_read:
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self.file_object.close()
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def __len__(self):
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return len(self.file_object)
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