python string.atof( )函数

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string.atof(s)将字符串转为浮点型数字

    >>> string.atof("1.23")    1.23    >>> string.atof("1")    1.0

string.atoi(s,[base=num])将字符串转为整型数字,base 指定进制

    >>> string.atoi("20")    20    >>> string.atoi("20",base=10)    20    >>> string.atoi("20",base=16)    32    >>> string.atoi("20",base=8)    16    >>> string.atoi("20",base=2)    Traceback (most recent call last):      File "", line 1, in <module>      File "/usr/lib64/python2.6/string.py", line 403, in atoi        return _int(s, base)    ValueError: invalid literal for int() with base 2: '20'    >>> string.atoi("101",base=2)    5    >>> string.atoi("101",base=6)    37

string.capwords(s,sep=None)以sep作为分隔符，分割字符串s，然后将每个字段的首字母换成大写

    >>> string.capwords("this is a dog")    'This Is A Dog'    >>> string.capwords("this is a dog",sep=" ")    'This Is A Dog'    >>> string.capwords("this is a dog",sep="s")    'This is a dog'    >>> string.capwords("this is a dog",sep="o")    'This is a doG'    >>>

string.maketrans(s,r)创建一个s到r的转换表，然后可以使用translate()方法来使用

    >>> replist=string.maketrans("123","abc")    >>> replist1=string.maketrans("456","xyz")    >>> s="123456789"    >>> s.translate(replist)    'abc456789'    >>> s.translate(replist1)    '123xyz789'

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