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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 get_reader_class(reader_name):
 """Get a particular reader class by name."""

    for reader_class in get_reader_classes():
        if reader_class.name.lower() == reader_name.lower():
            return reader_class
    else:
        logger.error("No such reader: %s" % reader_name)
        return None