#combine dict dict1 = {'BH': ['apple1', 'banana1'], 'FB': ['orange1', 'grapes1']} dict2 = {'BH': ['apple2', 'banana2'], 'FB': ['orange2', 'grapes2']} dict3 = {} for k in dict1.keys(): dict3[k] = ['one/' + itm for itm in dict1[k]] + ['two/' + itm for itm in dict1[k]] print(dict3)