伯克利 CS61A 课堂笔记 05 —— Design

本系列为加州伯克利大学著名 Python 基础课程 CS61A 的课堂笔记整理，全英文内容，文末附词汇解释。

目录

01 Designing Functions

02 Functional Abstractions

03 Chosing Names

04 Return Statements

05 Conditional Statements

06 If Statements and Call Expressions

07 Logical Operators

08 Function Decorator —— @tracel

附：词汇解释

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01 Designing Functions

A function's domain(定义域) is the set of all inputs it might possibly take as arguments.

A function's range(范围) is the set of output values it might possibly return.

A pure function's behavior is the relationship it creates between input and output.

A Guide to Design Function:

① Give each function exactly one job. 分工

② Don't repeat yourself. Implement a process just one, but execute it many times. 调用

③ Define functions generally. 泛化

02 Functional Abstractions

identically 同一地；相等地

03 Chosing Names

Names typically don't matter for correctness but they matter a lot for composition (组成). They should convey(表达) the meaning or purpose of the values to which they are bound.

Function names typicall