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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_rep(u):
 """Given a string, return a UUID object."""

        if isinstance(u, pyversion.string_types):
            return uuid.UUID(u)

        # hack to remove signs
        a = ctypes.c_ulong(u[0])
        b = ctypes.c_ulong(u[1])
        combined = a.value << 64 | b.value
        return uuid.UUID(int=combined)