>>> #operation in seuence
>>> s = 'spam and ham'
>>> s[0]
's'
>>> s[1]
'p'
>>> s[-1]
'm'
>>> s[1:5]
'pam '
>>> s + s
'spam and hamspam and ham'
>>> s * 5
'spam and hamspam and hamspam and hamspam and hamspam and ham'
>>> 'a' in s
True
>>> 'z' in s
False
>>> len(s)
12
>>>
>>>
>>> str1 = 'Python is simple!'
>>> str2 = "That's right."
>>> str3 = "Don\'t just play."
>>> long_str = 'long line\
continued..'
>>> 
>>> multiple_lines = '''
first line
second line
third line
'''
>>> print multiple_lines

first line
second line
third line

>>> 
>>> #Escape character (or Escape sequence)
>>> print 'a\nb\nc'
a
b
c
>>> print 'a\012b\012c'
a
b
c
>>> 
>>> #Modification of string
>>> s = 'spam and egg'
>>> s = s[:5] + 'cheese ' + s[5:]
>>> s
'spam cheese and egg'
>>> 
>>> 
>>> #Formatting
>>> '%s -- %s' % ([1,2,3],[4,5,6])
'[1, 2, 3] -- [4, 5, 6]'
>>> 
>>> '%3d' % 1
'  1'
>>> '%3d' % 123456
'123456'
>>> '%5.2f' % 1.23456
' 1.23'
>>> '%5.2f' % 1.23567
' 1.24'
>>> '%5.2f' % 9999991.23567
'9999991.24'
>>> '%5.2d' % 9999991.23567
'9999991'
>>> 
>>> print '%(name)s -- %(phone)s' % {'name':'Hyuk Cho', 'phone':4567}
Hyuk Cho -- 4567
>>> D = {'name':'Hyuk Cho', 'phone':1234}
>>> print '%(name)s abcde %(name)s %(phone)s' % D
Hyuk Cho abcde Hyuk Cho 1234
>>> 
>>> 
>>> #Methods in string
>>> s = 'spam and ham'
>>> s.upper()
'SPAM AND HAM'
>>> s.lower()
'spam and ham'
>>> s.capitalize()
'Spam and ham'
>>> s
'spam and ham'
>>> s.count('a')
3
>>> 
>>> s.count('z')
0
>>> s.find('and')
5
>>> s.find('m')
3
>>> s.rfind('m')
11
>>> s.find('m', 4)
11
>>> s.find('egg')
-1
>>> s.index('egg')

Traceback (most recent call last):
  File "<pyshell#69>", line 1, in -toplevel-
    s.index('egg')
ValueError: substring not found
>>> s.index('and')
5
>>> try:
	k = s.index('egg')
except ValueError:
	print 'egg not found'

	
egg not found
>>>