Upload New File

딕셔너리 연습.py

+Python 3.7.1 (v3.7.1:260ec2c36a, Oct 20 2018, 03:13:28) 
+[Clang 6.0 (clang-600.0.57)] on darwin
+Type "help", "copyright", "credits" or "license()" for more information.
+>>> #딕셔너리 자료형
+>>> dic = {'name':'kim','phone':'01000000000','birth':'1995'}
+>>> dic[1]
+Traceback (most recent call last):
+  File "<pyshell#2>", line 1, in <module>
+    dic[1]
+KeyError: 1
+>>> dic['name']
+'kim'
+>>> a={1:[1,2,3]}
+>>> a
+{1: [1, 2, 3]}
+>>> a[1]
+[1, 2, 3]
+>>> a={1:'a'}
+>>> a
+{1: 'a'}
+>>> a[2] = 'b'
+>>> a
+{1: 'a', 2: 'b'}
+>>> a['name']='kim'
+>>> a
+{1: 'a', 2: 'b', 'name': 'kim'}
+>>> a[3]=[1,2,3]
+>>> a
+{1: 'a', 2: 'b', 'name': 'kim', 3: [1, 2, 3]}
+>>> del a['name']
+>>> a
+{1: 'a', 2: 'b', 3: [1, 2, 3]}
+>>> del a[3]
+>>> a
+{1: 'a', 2: 'b'}
+>>> #딕셔너리는 튜플과 리스트처럼 인덱싱 할 수없다.
+>>> a[1]
+'a'
+>>> #딕셔너리에서 a[1]은 2번째 인덱스의 값을 부르는것이 아니라 key값이 1인 것의 value를 의미
+>>> a['a']
+Traceback (most recent call last):
+  File "<pyshell#22>", line 1, in <module>
+    a['a']
+KeyError: 'a'
+>>> a={'a':1, 'b':2}
+>>> a['a']
+1
+>>> #딕셔너리에서 key 값은 중복되면 안된다.
+>>> a={1:'a',1:'b'}
+>>> a
+{1: 'b'}
+>>> #key값으로 리스트는 안되고 튜플은된다.
+>>> a= {[1,2]:'a',2:'b'}
+Traceback (most recent call last):
+  File "<pyshell#29>", line 1, in <module>
+    a= {[1,2]:'a',2:'b'}
+TypeError: unhashable type: 'list'
+>>> a= {(1,2):'a',2:'b'}
+>>> a[(1,2)]
+'a'
+>>> #딕셔너리 관련 함수들
+>>> a={'name':'kim','phone':'01050010000','birth':'1995'}
+>>> a.keys()
+dict_keys(['name', 'phone', 'birth'])
+>>> for i in a.keys()
+SyntaxError: invalid syntax
+>>> for i in a.keys():
+	print(i)
+
+	
+name
+phone
+birth
+>>> a.values()
+dict_values(['kim', '01050010000', '1995'])
+>>> a.items()
+dict_items([('name', 'kim'), ('phone', '01050010000'), ('birth', '1995')])
+>>> a.clear()
+>>> a
+{}
+>>> a={'name':'kim','phone':'01050010000','birth':'1995'}
+>>> 'name' in a
+True
+>>> 'ne' in a
+False
+>>> #연습문제 딕셔너리 만들기
+>>> a={'name':'honggildong','birth':'1128','age':'30'}
+>>> a
+{'name': 'honggildong', 'birth': '1128', 'age': '30'}
+>>> #추출
+>>> a={'a':90,'b':90,'c':70}
+>>> a['b']
+90
+>>> del a['b']
+>>> a
+{'a': 90, 'c': 70}
+>>> a.['b']
+SyntaxError: invalid syntax
+>>> a['b']
+Traceback (most recent call last):
+  File "<pyshell#55>", line 1, in <module>
+    a['b']
+KeyError: 'b'
+>>> a.get('b':70)
+SyntaxError: invalid syntax
+>>> a.get('b'/70)
+Traceback (most recent call last):
+  File "<pyshell#57>", line 1, in <module>
+    a.get('b'/70)
+TypeError: unsupported operand type(s) for /: 'str' and 'int'
+>>> a.get('b'/'70')
+Traceback (most recent call last):
+  File "<pyshell#58>", line 1, in <module>
+    a.get('b'/'70')
+TypeError: unsupported operand type(s) for /: 'str' and 'str'
+>>>