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a = {1:"Hello!!"}
print(a)

{1: 'Hello!!'}

a = {'first':['a','b','c']}
print(a)

{'first': ['a', 'b', 'c']}

sports = {"축구":"박지성", "야구":"강정호", "체조":"손연제"}
print(sports["축구"])
print(sports["야구"])

박지성
강정호

aa = {1:"안녕"}
aa[2] = "하이"
print(aa)
aa[3] = "방가"
print(aa)
aa["인사"] = "굿모닝"
print(aa)
aa[3] = [1,2,3]
print(aa)

{1: '안녕', 2: '하이'}
{1: '안녕', 2: '하이', 3: '방가'}
{1: '안녕', 2: '하이', 3: '방가', '인사': '굿모닝'}
{1: '안녕', 2: '하이', 3: [1, 2, 3], '인사': '굿모닝'}

aa[age] = 34
Traceback (most recent call last):
File "<pyshell#26>", line 1, in <module>
aa[age] = 34
NameError: name 'age' is not defined

aa["age"] = 34
print(aa)

{1: '안녕', 2: '하이', 3: [1, 2, 3], '인사': '굿모닝', 'age': 34}

aa[0] = "adf"
print(aa)

{0: 'adf', 1: '안녕', 2: '하이', 3: [1, 2, 3], 'age': 34, '인사': '굿모닝'}


del aa[0]
print(aa)

{1: '안녕', 2: '하이', 3: [1, 2, 3], 'age': 34, '인사': '굿모닝'}