[Python] 포함(Containment) 연산자 in, not in

 

파이썬에는 포함(Containment) 연산자를 ( in, not in ) 제공하며, 객체 in (not in) 시퀀스의 형태로 사용 가능하다.

 

---

 

1. 문자열(strings)

 

########### in ###########

if 'p' in 'python':
    print(True)

else:
    print(False)
-------------------------
True


########### not in ###########

if 'k' not in 'python':
    print(True)
else:
    print(False)
-------------------------
True

 

 

 

2. 리스트(list)

 

############## in ##############

if 'a' in ['a','b','c']:
    print(True)
else:
    print(False)
--------------------------------
True

############## not in ##############
if 'd' not in ['a','b','c']:
    print(True)
else:
    print(False)
--------------------------------
 True

 

 

3. 튜플(tuple)

 

############# in #############
if 'a' in ('a','b','c'):
	print(True)
else:
	print(False)
-------------------------
True

############# not in #############
if 'd' not in ('a','b','c'):
	print(True)
else:
	print(False)
-------------------------
True

 

 

 

4. 딕셔너리(Dictionary)

 

########### in ###########

if 'a' in {'a':1,'b':2}:
	print(True)
else:
	print(False)
---------------------------
True


########### not in ###########

if 'c' not in {'a':1,'b':2}:
	print(True)
else:
	print(False)
---------------------------
False