批量生成对象

exec() + string.format()

class testclass():
    def __init__(self):
        print("obj is created!")
        self.num=1
        
exec('var{} = {}'.format(i, i))
exec("obj{}=testclass()".format("demo"))
print(objdemo.num)
===============
output:
1

class testclass():
    def __init__(self):
        print("obj is created!")
        self.num=1
exec("aa=testclass()")
print(type(aa))
print(aa.num)
===============
output:
obj is created!
<class '__main__.testclass'>
1

locals()

class A():
    def __init__(self):
        self.val = 10
for i in range(10):
    locals()[f'x{i}'] = A()
==========================
x1,x2...x10都是创建出的对象