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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 delete_table(table_name):
 """Mainly for testing."""

    to_delete = [
        make_key(table_name, rec['id'])
        for rec in read_by_indexes(table_name, [])
    ]

    with DatastoreTransaction() as tx:
        tx.get_commit_req().mutation.delete.extend(to_delete)