浅谈python字符串方法的简单使用

>>> s = 'wwwwww'
 >>> scap = s.capitalize()
 >>> scap 
 'Wwwwww'

>>> s 
'wwwwww'
>>> s = 'wwwwww'
>>> scen = s.center(20)
>>> scen
'    wwwwww    '
>>> scen0 = s.center(20,'Y')
>>> scen0
'YYYYYYYwwwwwwYYYYYYY'
>>>

>>> scen0
'YYYYYYYwwwwwwYYYYYYY'
>>> scoun = scen0.count('w',0,19)
>>> scoun
6

>>> scen0 
'YYYYYYYwwwwwwYYYYYYY'
>>> sends0 = scen0.endswith('Y',1,19)
>>> sends0
True
>>> sends1 = scen0.endswith('w',1,10)
>>> sends1
True

>>> s
'YYYYYYYwwwwwwYYYYYYY'
>>> t = 'w'
>>> sfind = s.find(t,0,19)
>>> sfind
7
>>> srfind = s.rfind(t,1,19)
>>> srfind
12

 >>> s
 'YYYYYYYwwwwwwYYYYYYY'
 >>> sisa = s.isalnum()
 >>> sisa
 True

>>> s
'YYYYYYYwwwwwwYYYYYYY'
>>> sisal = s.isalpha()
>>> sisal
True

>>> s1
'ssss0000'
>>> sisal0 = s1.isalpha()
>>> sisal0
False

>>> sdigit = 'www000'
>>> sd = sdigit.isdigit()
>>> sd
False
>>> sdigit0 = '1234567890'
>>> sd0 = sdigit0.isdigit()
>>> sd0
True

>>> s0 = '1234567890'
>>> s0lower = s0.islower()
>>> s0lower
False

>>> s1 = '1234WWW'
>>> s1lower = s1.islower()
>>> s1lower
False


>>> s2 = '123456789w'
>>> s2lower = s2.islower()
>>> s2lower
True

>>> s = ''
>>> s0 = s.isspace()
>>> s0
False
>>> s = '  '
>>> s0 = s.isspace()
>>> s0
True

>>> s = 'wy'
>>> s0 = s.istitle()
>>> s0
False
>>> s = 'Wy'
>>> s0 = s.istitle()
>>> s0
True

>>> s = 'wy'
>>> s0 = s.isupper()
>>> s0
False

>>> s = 'Wy'
>>> s0 = s.isupper()
>>> s0
False

>>> s = 'WY'
>>> s0 = s.isupper()
>>> s0
True

>>> seq = 'WWWWWWW'
 >>> s = 'y'
 >>> snew = s.join(seq)
 >>> snew
 'WyWyWyWyWyWyW'

>>> snew
 'WyWyWyWyWyWyW'
 >>> s =snew.lower()
 >>> s
 'wywywywywywyw'

>>> s
'wywywywywywyw'
>>> sre = s.replace('w','W')
>>> sre
'WyWyWyWyWyWyW'

>>> s
'wywywywywywyw'
>>> sre = s.replace('w','W',4)
>>> sre
'WyWyWyWywywyw'

>>> s = 'WyWyWyWy'
 >>> ssw = s.swapcase()
 >>> ssw
 'wYwYwYwY'

>>> s = 'www'
 >>> sz = s.zfill(10)
 >>> sz
 '0000000www'