为什么执行老师的程序，class OldStyle:
def _init_(self,name,description):
self.name=name
self.description=description
class NewStyle(object):
def _init_(self,name,description):
self.name=name
self.description=description
if __name__=='_main_':
old=OldStyle('old','OldStyle')
print(old)
print (type(old))
print(dir(old))
print('-------------------------------------')
new=NewStyle('new','NewStyle')
print (type(new))
print(dir(new))编译成功，却没结果
2018-12-05
class OldStyle:
#这里__init__是两下划线哦
def __init__(self, name, description):
self.name = name
self.description = description
class NewStyle(object):
#这里也__init__是两下划线哦
def __init__(self, name, description):
self.name = name
self.description = description
# 这里是 '__main__' 是两下划线哦 因为：__name__ == '_main_' 是不相等，所以这个if下的代码就没在执行
if __name__ == '__main__':
old = OldStyle('old', 'OldStyle')
print(old)
print(type(old))
print(dir(old))
print('-------------------------------------')
new = NewStyle('new', 'NewStyle')
print(type(new))
print(dir(new))
举报
