zoukankan      html  css  js  c++  java
  • python学习之__format__

    定制__format__方法

    format_dic={
    'ymd':'{0.year}{0.mon}{0.day}',
    'm-d-y':'{0.mon}-{0.day}-{0.year}',
    'y:m:d':'{0.year}:{0.mon}:{0.day}'
    }
    class Date:
    def __init__(self,year,mon,day):
    self.year=year
    self.mon=mon
    self.day=day
    def __format__(self, format_spec):
    print('我执行啦')
    print('--->',format_spec)
    if not format_spec or format_spec not in format_dic:
    format_spec='ymd'
    fm=format_dic[format_spec]
    return fm.format(self)
    d1=Date(2016,12,26)
    # format(d1) #d1.__format__()
    # print(format(d1))
    print(format(d1,'ymd'))
    print(format(d1,'y:m:d'))
    print(format(d1,'m-d-y'))
    print(format(d1,'m-d:y'))
    print('===========>',format(d1,'asdfasdfsadfasdfasdfasdfasdfasdfasdfasdfasdfasdfasd'))

  • 相关阅读:
    动态规划题 HDU-1024
    高效位运算 __builtin_系列函数
    使用评价
    站立会议12-12
    场景调研
    站立会议12-10
    站立会议12-9
    站立会议12-8
    站立会议12-7
    站立会议12-6
  • 原文地址:https://www.cnblogs.com/jinpingzhao/p/12771721.html
Copyright © 2011-2022 走看看