字典创建

demo

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dict1 = {}
# dict1[20] = 'bill'
dict1[10] = 'bill'# 加入一个字典
dict1["mike"] = {'age':20,'salary':3000}
print(dict1)
list1 = [10]
num = 1
list2 = []
if 'bill' in  dict1.values(): #判断是否在一个字典上
    print('yes')
if list1[0] not in  dict1.values(): #判断是否在一个字典上
    dict1[num] = list1[0]
    num = num + 1
    list2.append(list1[0])
    print(dict1)
    print(list2)

输出

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{10: 'bill', 'mike': {'age': 20, 'salary': 3000}}
yes