diff --git "a/\341\204\206\341\205\256\341\206\253\341\204\214\341\205\241\341\204\213\341\205\247\341\206\257\341\204\213\341\205\247\341\206\253\341\204\211\341\205\263\341\206\270.py" "b/\341\204\206\341\205\256\341\206\253\341\204\214\341\205\241\341\204\213\341\205\247\341\206\257\341\204\213\341\205\247\341\206\253\341\204\211\341\205\263\341\206\270.py"
new file mode 100644
index 0000000000000000000000000000000000000000..7a599f8bada4ac8705052682e11523da213e5855
--- /dev/null
+++ "b/\341\204\206\341\205\256\341\206\253\341\204\214\341\205\241\341\204\213\341\205\247\341\206\257\341\204\213\341\205\247\341\206\253\341\204\211\341\205\263\341\206\270.py"
@@ -0,0 +1,107 @@
+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.
+>>> #문자열
+>>> #pithon 이라는 문자열을 python으로 바꾸려면 어떡해야할까??
+>>> 
+>>> a='pithon'
+>>> a[1]
+'i'
+>>> a[1] = 'y'
+Traceback (most recent call last):
+  File "<pyshell#5>", line 1, in <module>
+    a[1] = 'y'
+TypeError: 'str' object does not support item assignment
+>>> #문자열이나 튜플은 그 요소를 변경할 수 없다. 따라서 슬라이싱을 이용하여 바꿔줘야한다.
+>>> a[:1}
+SyntaxError: invalid syntax
+>>> a[:1]
+'p'
+>>> a[2:]
+'thon'
+>>> a[:1] + 'y' + a[2:]
+'python'
+>>> #문자열 포맷팅
+>>> "I eat %d apples.".%3
+SyntaxError: invalid syntax
+>>> "i eat %d apples."%3
+'i eat 3 apples.'
+>>> "i eat %s apples." % "three"
+'i eat three apples.'
+>>> #문자열 관련 함수들
+>>> a = "hobby"
+>>> a.count(a)
+1
+>>> a.count("a")
+0
+>>> a.count("b")
+2
+>>> a = "python is the best  choice"
+>>> a.find('o')
+4
+>>> a.find('i')
+7
+>>> #find는 글자가 가장 처음나온 위치를 알려준다.
+>>> a.find('z')
+-1
+>>> a.index('z')
+Traceback (most recent call last):
+  File "<pyshell#25>", line 1, in <module>
+    a.index('z')
+ValueError: substring not found
+>>> a=','
+>>> a.join('abcd')
+'a,b,c,d'
+>>> ','.join('abvcd')
+'a,b,v,c,d'
+>>> a='hi'
+>>> a.upper()
+'HI'
+>>> a
+'hi'
+>>> a='HI'
+>>> a.lower()
+'hi'
+>>> a
+'HI'
+>>> a= 'life is too short'
+>>> a.replace('life','your leg')
+'your leg is too short'
+>>> print("jump to python")
+jump to python
+>>> print('''life is too short
+you need python''')
+life is too short
+you need python
+>>> print('/t/t/t/t/t/tPYTHON')
+/t/t/t/t/t/tPYTHON
+>>> print(/t/t/t/t/t/t'python')
+SyntaxError: invalid syntax
+>>> print('\t\t\t\t\t\tPython')
+						Python
+>>> h='881120-1068234'
+>>> a=h[:6]
+>>> b=h[7:]
+>>> a
+'881120'
+>>> b
+'1068234'
+>>> s='1980M1120'
+>>> s[0]=M
+Traceback (most recent call last):
+  File "<pyshell#49>", line 1, in <module>
+    s[0]=M
+NameError: name 'M' is not defined
+>>> print('M'+s[0:4] + s[5:])
+M19801120
+>>> a='life is too short, you need python'
+>>> a.index('short')
+12
+>>> a='a:b:c:d'
+>>> a.replace(':',"#')
+	      
+SyntaxError: EOL while scanning string literal
+>>> a.replace(":","#")
+	      
+'a#b#c#d'
+>>>