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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 from_text(rdclass, rdtype, tok, origin = None, relativize = True):
 """Build an rdata object from text format. This function attempts to dynamically load a class which implements the specified rdata class and type. If there is no class-and-type-specific implementation, the GenericRdata class is used. Once a class is chosen, its from_text() class method is called with the parameters to this function. @param rdclass: The rdata class @type rdclass: int @param rdtype: The rdata type @type rdtype: int @param tok: The tokenizer @type tok: dns.tokenizer.Tokenizer @param origin: The origin to use for relative names @type origin: dns.name.Name @param relativize: Should names be relativized? @type relativize: bool @rtype: dns.rdata.Rdata instance"""


    if isinstance(tok, str):
        tok = dns.tokenizer.Tokenizer(tok)
    cls = get_rdata_class(rdclass, rdtype)
    if cls != GenericRdata:
        # peek at first token
        token = tok.get()
        tok.unget(token)
        if token.is_identifier() and \
           token.value == r'\#':
            #
            # Known type using the generic syntax.  Extract the
            # wire form from the generic syntax, and then run
            # from_wire on it.
            #
            rdata = GenericRdata.from_text(rdclass, rdtype, tok, origin,
                                           relativize)
            return from_wire(rdclass, rdtype, rdata.data, 0, len(rdata.data),
                             origin)
    return cls.from_text(rdclass, rdtype, tok, origin, relativize)