How to read specific part of large file in Python

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You can seek into the file the file and then read a certain amount from there. Seek allows you to get to a specific offset within a file, and then you can limit your read to only the number of bytes in that range.

with open(filename) as fin:
    fin.seek(start_index)
    data = fin.read(end_index - start_index)

That will only read that data that you’re looking for.

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