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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 read(self):
 """ Returns array of dictionaries containing all the data elements in the DICOM file. """

        def ds(data_element):
            value = self._str_filter.ToStringPair(data_element.GetTag())
            if value[1]:
                return DataElement(data_element, value[0].strip(), value[1].strip())

        results = [data for data in self.walk(ds) if data is not None]
        return results