多态 分发 分类： python 小练习 divide into python 2013-11-05 19:11 394人阅读 评论(0) 收藏

#coding:utf-8

def output_xml(name):
print 'XML:%s' % name

def output_html(name):
print 'HTML:%s' % name

def output_doc(name):
print 'DOC:%s' % name

def putdoc(types,name):
print types,type(types)
print name,type(name)

eval('output_%s("%s")' % (types,str(name)))

putdoc('doc',"sam")

#coding:utf-8

class outputForm(object):

def output_html(self,data):

print 'html:',data

def output_xml(self,data):
print 'xml:',data

def output_text(self,data):
print 'text:',data

if __name__=="__main__":
pass

#coding:utf-8

import myoutformat

def f(inst,form,data):

#inst.output_text 是默认的方法参数，返回函数（或者：getattr(inst,'output_text')），如果此处是个字符串，则返回该字符串。此处应该是函数名称，返回函数
fun=getattr(inst,"output_%s" % form,inst.output_text)
#调用函数fun
fun(data)

if __name__ == '__main__':
a=myoutformat.outputForm()
f(a,"html",'abc')
f(a,"xml",'abc')
f(a,"text",'abc')
f(a,"NAME",'abc')