Something like this should do it.
This
else:
pass
is not necessary.
attributes = {'background': 'White', 'foreground': 'Black'}
if self.PartName == self.data.getValueAt(rowIndex, "Seed Tube Part Number"):
attributes['background'] = 'Green'
attributes['foreground'] = 'White'
if colName == "Int Column" and value == self.CurrentProgramNumber:
attributes['background'] = 'Yellow'
attributes['foreground'] = 'Black'
return attributes