Upload New File

LectureNote - list,tuple, dict.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.
+>>> #리스트, 튜플, 딕셔너리
+>>> a=['oop','python','java']
+>>> a
+['oop', 'python', 'java']
+>>> a[0]
+'oop'
+>>> a[1]
+'python'
+>>> a[2]
+'java'
+>>> a[3]
+Traceback (most recent call last):
+  File "<pyshell#6>", line 1, in <module>
+    a[3]
+IndexError: list index out of range
+>>> b=[1,2,3,4,]
+>>> b
+[1, 2, 3, 4]
+>>> c=[1,2,3,4,5,6,7,8,9]
+>>> c[0:3]
+[1, 2, 3]
+>>> c[4:7}
+SyntaxError: invalid syntax
+>>> c[5:8]
+[6, 7, 8]
+>>> c[:7]
+[1, 2, 3, 4, 5, 6, 7]
+>>> a=[1,2,3,4]
+>>> b=[5,6,7,8]
+>>> a+b
+[1, 2, 3, 4, 5, 6, 7, 8]
+>>> a[2]=10
+>>> a
+[1, 2, 10, 4]
+>>> a[3]=0
+>>> a
+[1, 2, 10, 0]
+>>> len(a)
+4
+>>> a.append(50)
+>>> a
+[1, 2, 10, 0, 50]
+>>> a.extend([0,2,4,8])
+>>> a
+[1, 2, 10, 0, 50, 0, 2, 4, 8]
+>>> a.insert(3,500)
+>>> a
+[1, 2, 10, 500, 0, 50, 0, 2, 4, 8]
+>>> a.insert(1,100)
+>>> a
+[1, 100, 2, 10, 500, 0, 50, 0, 2, 4, 8]
+>>> a.remove(2)
+>>> a
+[1, 100, 10, 500, 0, 50, 0, 2, 4, 8]
+>>> a.remove(2)
+>>> a
+[1, 100, 10, 500, 0, 50, 0, 4, 8]
+>>> a.pop(4)
+0
+>>> a
+[1, 100, 10, 500, 50, 0, 4, 8]
+>>> a.index(10)
+2
+>>> a.index(10000)
+Traceback (most recent call last):
+  File "<pyshell#37>", line 1, in <module>
+    a.index(10000)
+ValueError: 10000 is not in list
+>>> a.append(1)
+>>> a.append(1)
+>>> a
+[1, 100, 10, 500, 50, 0, 4, 8, 1, 1]
+>>> a.count(1)
+3
+>>> a.sort()
+>>> a
+[0, 1, 1, 1, 4, 8, 10, 50, 100, 500]
+>>> a.sort(reverse=true)
+Traceback (most recent call last):
+  File "<pyshell#44>", line 1, in <module>
+    a.sort(reverse=true)
+NameError: name 'true' is not defined
+>>> a.sort(reverse=True)
+>>> a
+[500, 100, 50, 10, 8, 4, 1, 1, 1, 0]
+>>> a.reverse
+<built-in method reverse of list object at 0x112353448>
+>>> a.reverse()
+>>> a
+[0, 1, 1, 1, 4, 8, 10, 50, 100, 500]
+>>> a=(1,2,3)
+>>> type(a)
+<class 'tuple'>
+>>> a
+(1, 2, 3)
+>>> a=1,2,3,4,
+>>> a
+(1, 2, 3, 4)
+>>> type(a)
+<class 'tuple'>
+>>> a=(1,)
+>>> type(a)
+<class 'tuple'>
+>>> a=(1)
+>>> type(a)
+<class 'int'>
+>>> #요소가 한개일때 콤마 찍어줘야 하는 이유
+>>> b=1,
+>>> type(b)
+<class 'tuple'>
+>>> b
+(1,)
+>>> a=(1,2,3,4)
+>>> a[0]
+1
+>>> a[1]
+2
+>>> a[2]
+3
+>>> a[3]
+4
+>>> a[1] = 5
+Traceback (most recent call last):
+  File "<pyshell#69>", line 1, in <module>
+    a[1] = 5
+TypeError: 'tuple' object does not support item assignment
+>>> len(a)
+4
+>>> one,two,three,four = a
+>>> a
+(1, 2, 3, 4)
+>>> one
+1
+>>> two
+2
+>>> three
+3
+>>> four
+4
+>>> one,two,three = a
+Traceback (most recent call last):
+  File "<pyshell#77>", line 1, in <module>
+    one,two,three = a
+ValueError: too many values to unpack (expected 3)
+>>> dic = {}
+>>> dic['python'] = 'www.pthon.org'
+>>> dic['microsoft'] = 'www.microsoft.com'
+>>> dic['apple'] = 'www.apple.com'
+>>> dic['phthon']
+Traceback (most recent call last):
+  File "<pyshell#82>", line 1, in <module>
+    dic['phthon']
+KeyError: 'phthon'
+>>> dic['python']
+'www.pthon.org'
+>>> dic['microsoft']
+'www.microsoft.com'
+>>> type(dic)
+<class 'dict'>
+>>> dic
+{'python': 'www.pthon.org', 'microsoft': 'www.microsoft.com', 'apple': 'www.apple.com'}
+>>> dic.keys()
+dict_keys(['python', 'microsoft', 'apple'])
+>>> dic.values()
+dict_values(['www.pthon.org', 'www.microsoft.com', 'www.apple.com'])
+>>> dic.items()
+dict_items([('python', 'www.pthon.org'), ('microsoft', 'www.microsoft.com'), ('apple', 'www.apple.com')])
+>>>