Stage 2: Work Session5

Stage 2: Work Session5

Practice With Lists

• Exploring List Properties: You'll explore the difference between concatenating two lists with the + operator and appending with .append(). You'll also be introduced to a new operator +=.

• 實際操作：append 看來是直接加上這個element

• 案例

• append() 用在 list 添加元素

• 解說

• 繼續測試，使用三種方法，一種是直接加，一種 .append，一種是+=

• https://www.udacity.com/course/viewer#!/c-nd000/l-4170998786/e-4314441791/m-4302057440

學習使用隨機變數

• 先 import random

• 語法：using the random.randint(start, end) function

• 像 random.randint(0,10)

• If we want to concatenate a string and a number, we need to convert the integer into a string using the str() function

• e.g. print "Random number generated: " + str(random.randint(0,10))

• 創造 20 個 0~10 的變數 ，算出每一個數字出現幾次

• 加上表格

• 想 input&output，演算邏輯，何時停止(stopping point)

• 思考表格內的空格

Product List練習:

每個數字互相乘

找出最大的數字

Split

Spit 的相反，join

找出二個字串中相同的字

困難度高的案例 -play game

• 先把ml_string split 成一個個字串

• 設一個 for loop , go through each word in 剛轉成字串的 ml_string

• 找出 word 裡和 parts_of_speech 相同的值，assign 到 replacement 的變數

• 細節： ml_string 裡有一個值 ADJECTIVE! （內有驚嘆號）遇上parts_of_speech 中沒有驚嘆號的 ADJECTIVE，replacement 會顯示沒有驚嘆號的

• 如果對應上就顯示 None

• Check 如果 replacement 不是 None，就把重複的字（replacement）換成corgi

• relaced 這個空 list 加進 word （已經換好的字串堆）

把 replaced 字串堆 join 成一串

• 最後用 raw_input 方程式去換 corgi，創造 user_input

終端機的使用- Terminal

• Terminal lets you interact with your computer at a lower level than is normally possible by typing commands into what is called a "shell."

• Terminal is installed by default in a folder called "Utilities" within your "Applications" folder.

• cd: Stands for "change directory."

• ls: Stands for "list." The ls command lists all files and folders in the current directory.

IDLE- Python Shell

raw_input function

什麼是.pyc file

• A .pyc file is a Python file that has been translated into "byte code".

• 3.1 Introduction of abstraction

• Dance and Code !! 跳舞結合寫程式

• 寫程式 Take a break

需求：二十分鐘就開 Youtube 聽歌休息一下