• 向已有的字典鍵中新增值

 for j in range(batch_size):
     if h[j] in fast.keys():
         fast[h[j]].append((img_name[j], temp_f7[j, :].tolist()))
     else:
         # 需要注意的是此處的值設定為list，否則不能呼叫append函式
         fast[h[j]] = [(img_name[j], temp_f7[j, :].tolist())]

• 字典巢狀

fast.setdefault(1, {})['a'] = [1,2,3,4,5]
fast.setdefault(1, {})['b'] = 6
fast.setdefault(1, {})['c'] = '7'
fast.setdefault(1, {})['d'] = (8)

'''
{1: {'a': [1, 2, 3, 4, 5], 'b': 6, 'c': '7', 'd': 8}}
'''
 

• 遍歷字典

a = {'a': 1, 'b': 2, 'c': 3}
print('--------------遍歷key值(1)--------------')
for key in a:
    print(key, a[key])
print('--------------遍歷key值(2)--------------')
for key in a.keys():
    print(key, a[key])
print('--------------遍歷value值---------------')
for value in a.values():
    print(value)
print('--------------遍歷鍵值對(1)--------------')
for key, value in a.items():
    print(key, value)
print('--------------遍歷鍵值對(2)--------------')
for (key, value) in a.items():
    print(key, value)
print('--------------遍歷字典項-----------------')
for key_value in a.items():
    print(key_value)
 

輸出結果如下圖所示：