Python other functions call __init__ initialized values

Define a This class, Calc This class method implements the sum of square element squares:

#file_name: Init.py#!/usr/bin/env pythonclass A (): Def __init__ (Self,args): Self.args = args def calc (self): sum = 0 for i in Self.args:sum + = i * I print sum if __name__ = = ' __main__ ': a = A ([A.calc]) #实例化 () #类方法

Execute script init.py:

0> python init.py14

Perform different functions by judging whether there are parameter inputs:

Class a ():     def __init__ (Self,args):         self.args = args    def cal (self):         sum = 0        for n in  self.args:            sum += n *  n           print sum     def get_options ():    usage =  "usage: %prog [options]"     optionparser = optparse. Optionparser    parser = optionparser (usage)     parser.add_ Option ("-D", "--date", action= "store", type= "string",             dest= "Date", help= "Date you want request history") &nbSp;   options,args = parser.parse_args ()     date =  options.date    print dateif __name__ ==  ' __main__ ':     if len (SYS.ARGV)  > 1:        get_options ()     else:        a = a ([i])          a.cal ()

Separate functions are called when there are parameter inputs and no parameter inputs:

0> python2.6 parser.py-d 2015-09-11 2015-09-110> python2.6 parser.py 14

Python other functions call __init__ initialized values