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python 判斷兩個列表是否有公共元素

 

def common_data(list1, list2):  
     result = False  
     for x in list1:  
         for y in list2:  
             if x == y:  
                 result = True  
     return result  
print(common_data([1,2,3,4,5], [5,6,7,8,9]))  
print(common_data([1,2,3,4,5], [6,7,8,9]))