学习某一学科前，先了解它的核心知识点。
为了高效学习 [python 编程]，请提供该领域的核心知识点，涵盖重要性排名前 20% 的内容。这些关键知识将为我提供对该领域 80% 内容的全面理解和扎实基础。
In order to learn [主题] efficiently, please provide the core knowledge points of this field, covering the top 20% of importance. These key insights will enable me to develop a comprehensive understanding and solid foundation of 80% of the subject matter. Respond in Chinese.
