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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 merge_from(self, other):
 """Merge information from another PhoneNumberDesc object into this one."""

        if other.national_number_pattern is not None:
            self.national_number_pattern = other.national_number_pattern
        if other.example_number is not None:
            self.example_number = other.example_number