Jason Python Class 0/10

Touching Base and setting up

laurent

https://laurenthyz.github.io/jason/lesson0.html

1 Our First lesson

1.1 Proper set-up before the class

  • Open your web.wechat window
  • open your meet room https://meet.jit.si/jasonchengyu 共享电脑摄像头和麦克风两种方法（1-接受网页自动发放的共享提示 2-登上meet.jit.si后共享资源） 截图
  • put your headset and mic on, make sure both are working properly

1.2 Things Jason likes:

  • Sausage Man (香肠派对), a battle royale game stylized to the likenings of Fortnite and PUBG (PlayerUnknown’s BattleGrounds ).
  • Super Mario Bros
  • Drawing

1.3 Jason & programming

  • Wants to learn programming in order to write game and make lots of money :)
  • After our python introduction in Phuket, Jason went on to learn through 核桃编程 www.hetao101.com

  • Through 核桃编程Jason focused mainly on Scratch coding coding ( and that’s good )

    • For reference, here is the standard progression from hetao101.com

jieduan.png

1.4 STORE and PROCESS

1.4.1 Restaurants STORE and PROCESS food.

Restaurants must be able to STORE food & PROCESS/COOK it. A storage space full of food is not a restaurant. A cook and his knives alone is not a restaurant. A skilled cook with access to food storage? Now we are talking!

1.4.2 Computers are machines that STORE information and PROCESS that information

Essentially a computer is a machine that can STORE and PROCESS information. Based on that definition & the things we discussed, please draw a computer

1.4.3 Computers are everywhere!

Ask the adults around you:

  • “Dad, do you think that phones are computers? ”
  • “Mum, do you think that a TESLA car is a computer?”
  • “Teacher is your Huawei’s watch a computer too?”

Try to help them answer the question just like we did during the class.

1.4.4 Computers are powerful… but their Machine Language is too difficult

  • They only understand Machine Language (typically binaries, i.e. a bunch of 0 and 1)
  • MACHINE LANGUAGE is impractical for HUMANS to learn, MACHINE CODE is not humanly readable!

1.4.5 Update your big picture!

1.5 Fortunately we have many super heroes that speak ML

  • Those super-heroes are : C, C#, C++, Java, Python, Java-script etc…
  • You can call those super-heroes and invite them onto your computer
  • Provided we speak their language we can ask those super-heroes anything!

1.6 Update your big picture!

1.7 Spoiled for choice, which super-hero will you pick?

Which super-hero will you pick to control your computer? Will you pick the fastest (C)? Will you pick the cutest (Scratch)? Will you pic the most popular (Python)? It is not an easy question, and it does depend on your age and experience…

1.8 Let’s pick Python as our first language

  • Easy to learn, open-source, powerful and popular across researchers…Python rocks!
  • Learning Python basics properly and without rushing will greatly increase your ability to learn the second one (In Mainland China that second language is typically C++)

1.9 Update your big picture!

1.10 Next class we write hello.py

  • From that moment on Python will be your main partner
  • Your focus will be to:
    • learn Python’s grammar and vocabulary
    • write correct sentences with clear commands

Next class we will write a simple hello.py to our beloved Python super-hero.

1.11 Update your big picture!

Ok let’s wrap up this lesson review. Please redraw your Big Picture from scratch

2 New Vocabulary

2.1 Vocabulary to include in your BP

根据今天的反馈jason要用房间里的白板画出他脑海里的python big picture (要包含以下几项:

python 英雄 computer 电脑
Store 存储 Process 处理
ML 机器语言 Jason 编程人员
Envelope 信封 Letter (信封里的信)
StandardInput 标准输入 python’s left hand
python’s right hand Standard Output 标准输出
Standard Error 标准错误 print/say(显示)
return(返回)  

2.2 从scratch迈向Python?

I can know that Jason has studied some Scratch. Hopefully he is able to take what he learned there into python. Here is a picture that shows the similarities between both languages: scratchtopython.png

3 Data types

3.1 python data types 数据类别：

Please put the following items within you BP

  • boolean
  • string (字符串）
  • integer整数
  • float 浮点数
  • list列表
  • dictionaries

Attention: 重点在string, integer and float Jason should add his hello.py to his big picture making sure he uses variable declaration. 他要把他的hello.py 也画进去。 hello.py 文件里面不要乱用双引号和括号！

4 从Scratch 迈向 python!

Jason, after our 2nd lesson I asked you and your parents how long and far you had been with Scratch. I think it is worth for you to try and connect what we do with scratch, so I have found some picture that illustrate how both languages do the same thing. I hope it helps.

4.1 input 输入

图左是 Scratch 的表达方式, 图右是 Python 的语法。在 Scratch 中提问的结果会放入「答案」这个变数, Python 可以使用 input() 达> input.png

4.2 output 输出

图左是 Scratch 的表达方式, 图右是 Python 的语法。 output.png

4.3 arithmetic operations 数学运算

图左是 Scratch 的表达方式, 图右是 Python 的语法。 math.png

4.4 string operations 字串运算

图左是 Scratch 的表达方式, 图右是 Python 的语法。 string.png

4.5 comparison and logical operations 字串运算

图左是 Scratch 的表达方式, 图右是 Python 的语法。 logic.png

4.6 advanced math 进阶数学运算

图左是 Scratch 的表达方式, 图右是 Python 的语法。 math2.png

4.7 loop 回圈

图左是 Scratch 的表达方式, 图右是 Python 的语法。 loop.png

4.8 increment 变数

图左是 Scratch 的表达方式, 图右是 Python 的语法。 Python 可以使用中文「分数」当作变数名称。 increment.png

4.9 list 列表

图左是 Scratch 的表达方式, 图右是 Python 的语法。 Python 可以使用中文「清单」当作变数名称。 list.png

5 lesson 5 Comments/variables/input

5.1 Comments/注释

Comments are section of your code that will not be executed by Python, they are typically there to explain what is happening (useful when you work with others). 确保对模块, 函数, 方法和行内注释使用正确的风格 Python中的注释有单行注释和多行注释. Python中单行注释以 # 开头，例如： 

# the following code is a print statement
print("Hello World, my name is Jason!")

多行注释如下： 

'''
The code below is a simple print statement.
I am giving python a string of characters,
and I ask python to send it (to print it, to display it)
onto the standard output (typically the standard output is
the screen)
'''
print("Hello World, my name is Jason and I am a coder")

5.2 Creating variables

We talked about variables already. I said that variables are like labeled/named boxes that contain data. check the code below, and guess what python will do when it read it line by line: 

jason_age = 10
jason_best_friend = "Milo"
jason_birth_year = 2020 - jason_age
print(jason_age)
print(jason_best_friend)
print(jason_birth_year)

5.3 Use variables as much as you can

Within the section about comments we asked python to print “Hello World, my name is…”. Although it is correct, each time we can put data in a box and give that box a name we should do it…so let’s do it! 

hello = "Hello World, my name is Jason and I am coder".
byebye = "It was a pleasure to meet you, see you soon"
print(hello)
print(byebye)

5.4 Wrap up and homework

Here is the code we looked at during the class. You asked me:

  • “why are we using a ‘f’ ?”
  • “what is the empty []?”
  • “Line 19 and 23 why are we using 2 pairs of parentheses/parens?”

We will solve all those mysteries but for now please read the code below outloud, look at the different colors, and commit line 13,15 and 17 to memory (write those 3 lines 20 times!

restaurant.png