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课程简介

Python for Everybody 零基础程序设计（Python 入门）

• This course aims to teach everyone the basics of programming computers using Python. 本课程旨在向所有人传授使用 Python 进行计算机编程的基础知识。
• We cover the basics of how one constructs a program from a series of simple instructions in Python. 我们介绍了如何通过 Python 中的一系列简单指令构建程序的基础知识。
• The course has no pre-requisites and avoids all but the simplest mathematics. Anyone with moderate computer experience should be able to master the materials in this course. 该课程没有任何先决条件，除了最简单的数学之外，避免了所有内容。任何具有中等计算机经验的人都应该能够掌握本课程中的材料。
• This course will cover Chapters 1-5 of the textbook “Python for Everybody”. Once a student completes this course, they will be ready to take more advanced programming courses. 本课程将涵盖《Python for Everyday》教科书的第 1-5 章。学生完成本课程后，他们将准备好学习更高级的编程课程。
• This course covers Python 3.

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coursera

Python for Everybody 零基础程序设计（Python 入门）

Charles Russell Severance
Clinical Professor

个人主页
Twitter

University of Michigan

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课程资源

coursera原版课程-外网
coursera原版视频-中英文精校字幕-B站
Dr. Chuck官方翻录版视频-机器翻译字幕-B站

PY4E-课程配套练习-部分功能需科学上网
Dr. Chuck Online - 系列课程开源官网

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Quiz 4: Functions

Take a brief look at how Python implements the ‘store and use later’ programming pattern.

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单选题（1-9）

1. Which Python keyword indicates the start of a function definition?

• sweet
• def
• break
• help

2. In Python, how do you indicate the end of the block of code that makes up the function?

• You de-indent a line of code to the same indent level as the def keyword
• You add the matching curly brace that was used to start the function
• You put a
• You put the “END” keyword in column 7 of the line which is to be the last line of the function

3. In Python what is the input() feature best described as?

• A built-in function
• A conditional statement
• A user-defined function
• The central processing unit

4. What does the following code print out?

def thing():
    print('Hello')
 
print('There')

• Hello
• defthing
• There
• thingHelloThere

5. In the following Python code, which of the following is an “argument” to a function?

x = 'banana'
y = max(x)
print(y)

• x
• max
• print
• ‘banana’

6. What will the following Python code print out?

def func(x) :
    print(x)
 
func(10)
func(20)

• 1020
• x10x20
• x20
• funcfunc

7. Which line of the following Python program will never execute?

def stuff():
    print('Hello')
    return
    print('World')
 
stuff()

• def stuff():
• stuff()
• return
• print (‘World’)
• print(‘Hello’)

8. What will the following Python program print out?

def greet(lang):
    if lang == 'es':
        return 'Hola'
    elif lang == 'fr':
        return 'Bonjour'
    else:
        return 'Hello'
 
print(greet('fr'),'Michael')

• HolaBonjourHelloMichael
• defHolaBonjourHelloMichael
• Bonjour Michael
• Hola Michael

9. What is the most important benefit of writing your own functions?

• To avoid having more than 10 lines of sequential code without an indent or de-indent
• Avoiding writing the same non-trivial code more than once in your program
• Following the rule that whenever a program is more than 10 lines you must use a function
• Following the rule that no function can have more than 10 statements in it

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编程题

Exercise 4.6

题目：
Write a program to prompt the user for hours and rate per hour using input to compute gross pay.
Pay should be the normal rate for hours up to 40 and time-and-a-half for the hourly rate for all hours worked above 40 hours.
Put the logic to do the computation of pay in a function called computepay() and use the function to do the computation. The function should return a value.
Use 45 hours and a rate of 10.50 per hour to test the program (the pay should be 498.75). You should use input to read a string and float() to convert the string to a number.
Do not worry about error checking the user input unless you want to - you can assume the user types numbers properly. Do not name your variable sum or use the sum() function.

[Desired Output]
Pay 498.75

解题代码：

def computepay(hours, rate):
   if h <= 40:
       per = h * r
   else:
       per = 40 * r + (h - 40) * r * 1.5
   return per

hrs = input("Enter Hours:")
rat = input("Enter Hourly rate:")
h = float(hrs)
r = float(rat)

p = computepay(h, r)
print("Pay", p)