Python

中文处理

• 截取中文字符串

     1 def clipChinese(s, length):
     2     s = ''.join(re.split(r'<[^>]*>', s)) #替换掉HTML标签
     3     print s
     4     length = 3*length
     5     t = s[:length]
     6     try:
     7         unicode(t,'gbk')
     8     except:
     9         t = s[:length-1]
    10         try:
    11             unicode(t,'gbk')
    12         except:
    13             t = s[:length-2]
    14     if len(s) > length:
    15         return t + '...'
    16     return t
  

  参考了limodou老大的做法，我这个在django中使用。不知道为什么，在django中len('中文')=6

Python AOP

• 用原类实现AOP

  •    1 class MetaAll(type):
       2    def __new__(mcl, name, bases, dict):
       3       def log(func):
       4          def f(*args, **kwds):
       5             print 'pre %s' % func.__name__
       6             value = func(*args, **kwds)
       7             print 'post %s' % func.__name__
       8             return value
       9          return f
      10       for attr, value in dict.iteritems():
      11          if attr.startswith('set'):
      12             dict[attr] = log(value)
      13       return super(MetaAll, mcl).__new__(mcl, name, bases, dict)
      14 
      15 __metaclass__ = MetaAll
      16 
      17 class A:
      18    def __init__(self):
      19       self.__x = 1
      20 
      21    def getx(self):
      22       return self.__x
      23 
      24    def setx(self, value):
      25       self.__x = value
      26 
      27 a = A()
      28 a.setx(2)
      29 print a.getx()