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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def log_entries_in_range(entries, start, end):
    '''filter out entries before start and after end'''
    start = _timestamp_from_string(start)
    end = _timestamp_from_string(end)
    for entry in entries:
        log_timestamp = entry.get('timestamp', 0)
        if log_timestamp >= start and log_timestamp <= end:
            yield entry