如何正确初始化一个类

如何解决如何正确初始化一个类

对于我的python作业，我必须创建类并对其进行初始化。我正确地创建了它们，但是自动平地机说它们没有正确初始化。

使用构造函数定义Artist类，以初始化艺术家的信息和print_info（）方法。默认情况下，构造函数应将艺术家的名称初始化为“ None”，并将出生和死亡的年份初始化为0。print_info（）应显示艺术家名称，如果死亡年份为-1，则显示XXXX，否则显示艺术家名称（XXXX-YYYY）。

使用构造函数定义美工类，以初始化美工的信息和print_info（）方法。默认情况下，构造函数应将标题初始化为“无”，将创建的年份初始化为0，并且艺术家使用Artist的缺省构造函数参数值。

到目前为止我所拥有的：

class Artist:
   def __init__(self,user_artist_name="None",user_birth_year=0,user_death_year=0):
       self.name = user_artist_name
       self.birth = user_birth_year
       self.death = user_death_year

   def print_info(self):
       if self.death == -1:
           print("Artist: {},born {}".format(self.name,self.birth))
       else:
           print("Artist: {} ({}-{})".format(self.name,self.birth,self.death))


class Artwork:
   def __init__(self,user_title= "None",year_created=0,user_artist=Artist()):
       self.title = user_title
       self.year = year_created
       self.artist = user_artist

   def print_info(self):
       print("Title: {},{}".format(self.title,self.year))


if __name__ == "__main__":
   user_artist_name = input()
   user_birth_year = int(input())
   user_death_year = int(input())
   user_title = input()
   user_year_created = int(input())

   user_artist = Artist(user_artist_name,user_birth_year,user_death_year)
   
   user_artist.print_info()

   new_artwork = Artwork(user_title,user_year_created,user_artist)

   new_artwork.print_info()

Artist（“ Pablo Picasso”，1881年，1973年）未能正确初始化艺术家。并且Artist和Artwork的默认参数的构造函数都会失败。

我想念什么？

解决方法

看起来这个练习经历了多次变量更新，他们忘记为很多初始化值更新模板。无论如何，这应该可以正常工作。

main.py

from Artist import Artist
from Artwork import Artwork

if __name__ == "__main__":
    user_artist_name = input()
    user_birth_year = int(input())
    user_death_year = int(input())
    user_title = input()
    user_year_created = int(input())

    user_artist = Artist(user_artist_name,user_birth_year,user_death_year)

    new_artwork = Artwork(user_title,user_year_created,user_artist)

    new_artwork.print_info()

艺术家.py

class Artist:
def __init__(self,name="None",birth_year=0,death_year=0):
    self.name = name
    self.birth_year = birth_year
    self.death_year = death_year

def print_info(self):
    if self.death_year == -1:
        print('Artist: {},born {}'.format(self.name,self.birth_year))
    else:
        print('Artist: {} ({}-{})'.format(self.name,self.birth_year,self.death_year))

Artwork.py

from Artist import Artist 

class Artwork:
def __init__(self,user_title="None",year_created=0,user_artist=Artist()):
    self.title = user_title
    self.year_created = year_created
    self.artist = user_artist

def print_info(self):
    self.artist.print_info()
    print('Title: %s,%d' % (self.title,self.year_created))

完成相同的任务并遇到不同的问题。我收到错误：“回溯（最近一次通话）：文件“main.py”，第 37 行，在 new_artwork.print_info() AttributeError: 'Artwork' 对象没有属性 'print_info'"

我在几个不同的地方调用了 print_info()，为什么最后一次失败了？

我的“def print_info(self)”函数有问题需要修复吗？

谢谢！

我的代码：

from Artist import Artist
from Artwork import Artwork

class Artist:
    def __init__(self,death_year=0):
        self.name = name
        self.birth_year = birth_year
        self.death_year = death_year

def print_info(self):
    if self.death_year == -1:
        print('Artist: {},self.death_year))

class Artwork:
    def __init__(self,user_artist=Artist()):
        self.title = user_title
        self.year_created = year_created
        self.artist = user_artist

def print_info(self):
    self.artist.print_info()
    print('Title: %s,self.year_created))

if __name__ == "__main__":
    user_artist_name = input()
    user_birth_year = int(input())
    user_death_year = int(input())
    user_title = input()
    user_year_created = int(input())

    user_artist = Artist(user_artist_name,user_artist)

    new_artwork.print_info()