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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 field(self, well_x=1, well_y=1, field_x=1, field_y=1):
 """ScanFieldData of specified field. Parameters well_x : int well_y : int field_x : int field_y : int Returns ------- lxml.objectify.ObjectifiedElement ScanFieldArray/ScanFieldData element. """

        xpath = './ScanFieldArray/ScanFieldData'
        xpath += _xpath_attrib('WellX', well_x)
        xpath += _xpath_attrib('WellY', well_y)
        xpath += _xpath_attrib('FieldX', field_x)
        xpath += _xpath_attrib('FieldY', field_y)
        # assume we find only one
        return self.root.find(xpath)