调用类报错，具体如下
TypeError: unbound method submit() must be called with jinjin instance as first argument (got float instance instead)
后来解决方法：在类名称后边加括号()
由于未添加括号情况下，未被认为是类的实例，故报此错
调用类报错，具体如下
TypeError: unbound method submit() must be called with jinjin instance as first argument (got float instance instead)
后来解决方法：在类名称后边加括号()
由于未添加括号情况下，未被认为是类的实例，故报此错