Which method can you use to determine whether an object is an instance of a class?

Question

BlackTom AI · Accepted Answer

To determine whether an object is an instance of a class, we need to assess each provided option in turn and explain why it does or does not serve that purpose.
Option 1: isinstance
This is the correct approach in Python. The isinstance(object, classinfo) function returns True if the object is an instance of the class or of a subclass thereof, and False otherwise. It directly addresses the concept of instance membership within a class hierarchy.
Option 2: isobject
This option is not a standard Python built-in function or operator for type or instance checking. It does not exist in the Python language, so it cannot be used to determine instance relationships. Relying on it would be a misconception about available tools.
Option 3: isclass
This name suggests a function that might check whether something is a class object itself, rather than an instance. However, there is no built-in isclass function in Python’s standard library for this purpose. Even if a similar concept existed in some frameworks, the phrasing here would not reliably determine instance status.
Option 4: issubclass
This function tests whether a class is a subclass of another class, not whether a given object is an instance. issubclass(A, B) returns True if A derives from B, but it does not tell you anything about a specific object’s instantiation. Therefore, it answers a different question than the one asked.

CMPSC 132 Spring 2025 Module 3.2 Checkpoint

Which method can you use to determine whether an object is an instance of a class?

查看解析

登录即可查看完整答案

类似问题

In a consumer society, many adults channel creativity into buying things

Economic stress and unpredictable times have resulted in a booming industry for self-help products

People born without creativity never can develop it

A product has a selling price of $20, a contribution margin ratio of 40% and fixed cost of $120,000. To make a profit of $30,000. The number of units that must be sold is: Type the number without $ and a comma. Eg: 20000

Which of the following statement regarding cost is correct:

Under the assumptions used in cost-volume-profit analysis, as the activity increases:

The CVP and break-even analysis are supported by a range of important assumptions. Which of the following is not an assumption of the CVP:

The break-even point is that at which:

更多留学生实用工具

考试浏览器助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单