python---定義字典a = {}，獲取內容

定義字典獲取，獲取相對應的值 aa = ['A', 'B', 'C'] #定義字典 a = {} #獲取數組元素個數 num = len(aa) for i in range(num): ia = aa[1] if i >1: ia = aa[2] print(ia) a[ia] = a.get(ia, 0)+1 print(a)

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