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시험전 마지막 정리..py

+Python 3.7.1 (v3.7.1:260ec2c36a, Oct 20 2018, 14:05:16) [MSC v.1915 32 bit (Intel)] on win32
+Type "help", "copyright", "credits" or "license()" for more information.
+>>> b="""hello.
+world.
+"""
+>>> b
+'hello.\nworld.\n'
+>>> type(b)
+<class 'str'>
+>>> a="hello"
+>>> a
+'hello'
+>>> a='hello'
+>>> a
+'hello'
+>>> a+b
+'hellohello.\nworld.\n'
+>>> a*4
+'hellohellohellohello'
+>>> # 문자열은 '+,*' 가능.
+
+>>> 
+>>> s='good morning'
+>>> s[0]
+'g'
+>>> s[0:4]
+'good'
+>>> 'sdasd' in s
+False
+>>> len(s)
+12
+>>> c='\n\n\n'
+>>> c
+'\n\n\n'
+>>> len(c)
+3
+>>> c='\\n\\n\\n'
+>>> c
+'\\n\\n\\n'
+>>> len(c)
+6
+>>> b='1234'
+>>> b.isnumeric()
+True
+>>> b=-2
+>>> bin(b)
+'-0b10'
+>>> b
+-2
+>>> 9&10
+8
+>>> 9^10
+3
+>>> ## &는 논리 곱으로 둘다 1인경우만 1로 표현된다.
+ 
+   44  +>>> ## 9 = 1001
+ 
+   45  +>>> ## 10= 1010
+ 
+   46  +>>> ## 8 = 1000
+ 
+
+SyntaxError: invalid character in identifier
+>>> 
+>>> >>> ## ^는 배타적 논리합 으로 둘다 다른 경우만 1이다.
+ 
+   51  +>>> ## 9 = 1001
+ 
+   52  +>>> ## 10= 1010
+ 
+   53  +>>> ## 3 = 0011
+ 
+
+SyntaxError: invalid syntax
+>>> 
+>>> a=255
+>>> ~a
+-256
+>>> a
+255
+>>> ## 비트연산자 ~ 는 이진수표현에서 0을 1로, 1을 0으로 뒤집고 -1을 한값이다.
+
+>>> 
+>>> a=2340
+>>> ~a
+-2341
+>>> bin(a)
+'0b100100100100'
+>>> bin(~a)
+'-0b100100100101'
+>>> a=76
+>>> bin(a)
+'0b1001100'
+>>> 9|10
+11
+>>> a=15
+>>> bin(15)
+'0b1111'
+>>> bin(15&0b1011)
+'0b1011'
+>>> ~a
+-16
+>>> a= ['가나다','마바사','123']
+>>> ㅁ[0]
+Traceback (most recent call last):
+  File "<pyshell#52>", line 1, in <module>
+    ㅁ[0]
+NameError: name 'ᄆ' is not defined
+>>> a[0]
+'가나다'
+>>> ## 리스트에는 숫자와 문자열을 같이 넣을수 있다.
+>>> 
+>>> a=[1,2,3,4,5,6,7,8,9,10]
+>>> a[0:5]
+[1, 2, 3, 4, 5]
+>>> a[8:]
+[9, 10]
+>>> a= ['가나다','마바사','123']
+>>> len(a)
+3
+>>> a[2]
+'123'
+>>> a=[1,2,3,4,5,6,7,8,9,10]
+>>> a[4]=11
+>>> a
+[1, 2, 3, 4, 11, 6, 7, 8, 9, 10]
+>>> a=[1,2,3,12,123,234124,23]
+>>> a.sort()
+>>> 
+>>> a
+[1, 2, 3, 12, 23, 123, 234124]
+>>> #오름차순 정렬
+>>> 
+>>> 
+>>> 
+>>> 
+>>> 
+>>> a=(1,2,3)
+>>> a[0]
+1
+>>> a[0]=4
+Traceback (most recent call last):
+  File "<pyshell#77>", line 1, in <module>
+    a[0]=4
+TypeError: 'tuple' object does not support item assignment
+>>> ## 튜플 - 변경이 불가능한 자료형.( 문자열도 변경x )
+>>> 
+>>> a=1
+>>> a
+1
+>>> type(a)
+<class 'int'>
+>>> a=1,
+>>> a
+(1,)
+>>> type(a)
+<class 'tuple'>
+>>> ## 요소가 하나인 경우에는 , 를 반드시 추가.
+>>> 
+>>> a=-4
+>>> b=51
+>>> a&b
+48
+>>> 0b110000
+48
+>>> a|b
+-1
+>>> a
+-4
+>>> 
+>>> 
+>>> >>> ## index 함수는 몇번째에 성분이있는지 찾아주는함수.
+ 
+   52  +>>> a=1,2,3
+ 
+   53  +>>> a
+ 
+   54  +(1, 2, 3)
+ 
+   55  +>>> a.index(2)
+ 
+   56  +1
+ 
+   57  +>>>  
+
+SyntaxError: invalid syntax
+>>> 
+>>> bin(-1)
+'-0b1'
+>>> bin(-5)
+'-0b101'
+>>> bin(51)
+'0b110011'
+>>> -5|51
+-5
+>>> -5&51
+51
+>>> ~1
+-2
+>>> dic['파이썬']="ㅈㅈㅈㅈ"
+Traceback (most recent call last):
+  File "<pyshell#104>", line 1, in <module>
+    dic['파이썬']="ㅈㅈㅈㅈ"
+NameError: name 'dic' is not defined
+>>> dic={}
+>>> dic['파이썬']="ㅈㅈㅈㅈ"
+>>> 파이썬
+Traceback (most recent call last):
+  File "<pyshell#107>", line 1, in <module>
+    파이썬
+NameError: name '파이썬' is not defined
+>>> dic['파이썬']
+'ㅈㅈㅈㅈ'
+>>> '파이썬'in dic.keys()
+True
+>>> 
+>>> b=([1,2,3],[4,5,6])
+
+>>> 
+>>> b
+([1, 2, 3], [4, 5, 6])
+>>> b[0]
+[1, 2, 3]
+>>> b[0][0]=9
+>>> b
+([9, 2, 3], [4, 5, 6])
+>>> 0xffff
+65535
+>>> a=3>2
+>>> a
+True
+>>> type(a)
+<class 'bool'>
+>>> ## bool값에서는 0 을 제외한 모든 값이 참이다.
+>>> 
+>>> 
+>>> >>> ## continue 와 break 의 차이점
+ 
+   4  +>>> ## break는 조건이만족되면 함수중단.
+ 
+   5  +>>> ## continue는 조건이만족되면, 다시 조건문으로 올라간다.
+ 
+
+SyntaxError: invalid syntax
+>>> for i in range(10):
+	if i % 2 == 1:
+		continue
+	print(i)
+
+	
+0
+2
+4
+6
+8
+>>> for i in range(10):
+	if i % 2 == 1:
+		break
+	print(i)
+
+	
+0
+>>> a=100
+>>> def local_test():
+	a=200
+	print(a)
+
+	
+>>> a
+100
+>>> local_test()
+200
+>>> a
+100
+>>> ## 함수안에서 사용되는 변수는 값이 한번 사용되고 값이 사라진다.
+>>> 
+>>> 
+>>> def local_test():
+	global a
+	a=200
+	print(a)
+
+	
+>>> local_test()
+200
+>>> a
+200
+>>> 0xf0
+240
+>>> 16*15
+240
+>>> a= 2+3j
+>>> a
+(2+3j)
+>>> type(a)
+<class 'complex'>
+>>> 
+>>> 
+>>> import math
+>>> math.pi
+3.141592653589793
+>>> a=(1,2,3,4,5,6)
+>>> a[:3]
+(1, 2, 3)
+>>> a[0]
+1
+>>>