元类
class Feng:
def __init__(self):
print('init')
f = Feng()
print(type(f))
print(type(Feng))
def __init__(self,name,age):
self.name = name
self.age = age
def test(self):
print('test')
Feng_new = type('Feng_new',(object,),{'x':2,'__init__':__init__,'test':test})
print(Feng_new)
print(Feng_new.__dict__)
#{'x': 2, '__init__': <function __init__ at 0x00000000004D2EA0>, '__module__': '__main__', '__dict__': <attribute '__dict__' of 'Feng_new' objects>, '__weakref__': <attribute '__weakref__' of 'Feng_new' objects>, '__doc__': None}
fs = Feng_new('fengfeng',18)
print(fs.__dict__)
fs.test()
异常
#异常处理
try:
age = input('>:')
int(age)
except ValueError as e:
print(e)
#通用异常
try:
age = input('>:')
int(age)
except Exception as e:
print(e)
finally:
print('go to it')
#断言
def test():
ref = 1
return ref
res1 = test()
# assert res1 == 2
#等同于
if res1 !=2:
raise AssertionError('....')
