Python:替换日历模块中的方法

Question

我正在尝试替换日历模块中的两种方法:

import calendar


c = calendar.HTMLCalendar(calendar.MONDAY)
def ext_formatday(self, day, weekday, *notes):
    if day == 0:
        return '<td class="noday">&nbsp;</td>'
    if len(notes) == 0:
        return '<td class="%s">%d<br /></td>' % (self.cssclasses[weekday], day)
    else:
        return '<td class="%s">%d<br />%s</td>' % (self.cssclasses[weekday], day, notes)

def ext_formatweek(self, theweek, *notes):
    if len(notes) == 0:
        s = ''.join(self.formatday(d, wd) for (d, wd) in theweek)
    else:
        s = ''.join(self.formatday(d, wd, notes) for (d, wd) in theweek)
    return '<tr>%s</tr>' % s 

c.formatday = ext_formatday
c.formatweek = ext_formatweek

print c.formatmonth(2012,1,"foobar")

这行不通 - 有人可以指点我相关文献或指出我做错了什么吗？我正在尝试从以下线程中实现 Alan Hynes 的建议:thread现在对我来说已经太晚了，我已经围绕这个问题思考了一个多小时。

提前致谢，
雅各布

Answer 1

尝试替换类中的方法而不是实例。

像这样:

import calendar                                                                                                 


def ext_formatday(self, day, weekday, *notes):                                                                  
    if day == 0:                                                                                                
        return '<td class="noday">&nbsp;</td>'                                                                  
    if len(notes) == 0:                                                                                         
        return '<td class="%s">%d<br /></td>' % (self.cssclasses[weekday], day)                                 
    else:                                                                                                       
        return '<td class="%s">%d<br />%s</td>' % (self.cssclasses[weekday], day, notes)                        

def ext_formatweek(self, theweek, *notes):                                                                      
    if len(notes) == 0:                                                                                         
        s = ''.join(self.formatday(d, wd) for (d, wd) in theweek)                                               
    else:                                                                                                       
        s = ''.join(self.formatday(d, wd, notes) for (d, wd) in theweek)                                        
    return '<tr>%s</tr>' % s                                                                                    

calendar.HTMLCalendar.formatday = ext_formatday                                                                 
calendar.HTMLCalendar.formatweek = ext_formatweek                                                               

c = calendar.HTMLCalendar(calendar.MONDAY)                                                                      
print c.formatmonth(2012,1,"foobar")