ObjectListView.SetColumns(self.observationList, [
ColumnDefn('PatientID', "left", 75, 'patientid'),
ColumnDefn('Subject', "left", 120, 'subjectid'),
ColumnDefn('Observer', "left", 120, 'observerid'),
ColumnDefn('Clinic', "left", 145, 'clinicid'),
ColumnDefn('AM/PM', "left", 60, 'sessionname'),
ColumnDefn('Date', "left", 75, 'date', isSpaceFilling=True),
])