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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 Place(self, x, flags):
 """ Place prepends a value specified by `flags` to the Builder, without checking for available space. """


        N.enforce_number(x, flags)
        self.head = self.head - flags.bytewidth
        encode.Write(flags.packer_type, self.Bytes, self.Head(), x)