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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_regex(data, position, dummy0, dummy1):
 """Decode a BSON regex to bson.regex.Regex or a python pattern object."""

    pattern, position = _get_c_string(data, position)
    bson_flags, position = _get_c_string(data, position)
    bson_re = Regex(pattern, bson_flags)
    return bson_re, position