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class Student(object):
def __init__(self, name, score):
self.name = name
self.score = score
def print_score(self):
print('%s: %s' % (self.name, self.score))
lg=Student('lg',99)
lg.name
lg.print_score()
class Person:
"""
不带object
"""
name = "zhengtong"
class Animal(object):
"""
带有object
"""
name = "chonghong"
if __name__ == "__main__":
x = Person()
print ("Person", len(dir(x)))
print ("Person", dir(x))
y = Animal()
print ("Animal", len(dir(y)))
print ("Animal", dir(y))
lg: 99
Person 27
Person ['__class__', '__delattr__', '__dict__', '__dir__', '__doc__', '__eq__', '__format__', '__ge__', '__getattribute__', '__gt__', '__hash__', '__init__', '__init_subclass__', '__le__', '__lt__', '__module__', '__ne__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__sizeof__', '__str__', '__subclasshook__', '__weakref__', 'name']
Animal 27
Animal ['__class__', '__delattr__', '__dict__', '__dir__', '__doc__', '__eq__', '__format__', '__ge__', '__getattribute__', '__gt__', '__hash__', '__init__', '__init_subclass__', '__le__', '__lt__', '__module__', '__ne__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__sizeof__', '__str__', '__subclasshook__', '__weakref__', 'name']
object是一个基类,或称之为元类。在Python3 中加不加一个样