从其他语言过渡到 Python 编程语言时需要学习的最重要的课程之一是，Python 中的每样东西都是对象。
One of the most important lessons to learn when transitioning to the Python programming language from another language is that everything in Python is an object.
在实际中，它们很难理解和掌握，特别是对于那些正在向面向对象应用程序开发过渡的程序设计人员。
In practice, they are hard to comprehend and master, especially for programmers who are making a transition to object-oriented application development.
本文讨论了在面向对象的系统开发中存在的各开发阶段之间的不平滑过渡问题。
The problem of unsmooth transition between the stages of object oriented system development is presented.
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