' 劉任昌集合{},字典{key:value,},元組(),清單或陣列[]'
p = ("台積電", "鴻海", "聯發科")
r = {"台積電", "鴻海", "聯發科"}
s = ["台積電", "鴻海", "聯發科"]
t = ["中華電", "台塑化", "台達電"]
d= {2330:"台積電",2317:"鴻海",2454:"聯發科"}
u = s
v = s.copy()
s.extend(t) #原來的 s=s.extend(t)是錯誤
i = 0
for a in r: #然後嘗試取代p為s(產生六個),r(產生三個)
i = i+1
print("台灣第" + str(i) + "大的公司是")
print(" " + a)
w3schools截圖練習append
239
243
244
VS Code編輯Python製作圖形使用者介面GUI
from tkinter import * #從函式庫 tkinter 輸入所有 * 方法
from math import * #從函式庫 math 輸入所有 * 方法
t = (3,4,5,6,7,8,9,10,11,12,16,20,32) #宣告一元組tuple(...)
tk = Tk()
tk.title("劉任昌圖形使用者介面GUI=Graphical Unser Interface")
canvas = Canvas(tk, width=500, height=500)
canvas.pack()
def show(event): #定義由事件event(按鈕選單)呼叫的函數show
cx, cy, cr = 210, 210, 200 #宣告圓中心座標cx, cy半徑cr
x, y =[],[] #宣告二陣列[...]
k = s.get() #取得 ge t按鈕選單的選擇變數
u = 2 * pi / k #使用模組 math 圓周率 pi
for i in range(k):
x.append(cx + cr*cos(i*u)) #加入陣列的元素
y.append(cy + cr*sin(i*u)) #使用模組 math 三角函數cos, sin
for i in range(k-1):
canvas.create_line(x[i], y[i], x[i+1], y[i+1])
canvas.create_line(x[k-1], y[k-1], x[0], y[0]) #可考慮增加width寬度,fill顏色
def diagonal():
cx, cy, cr = 210, 210, 200 #宣告圓中心座標cx, cy半徑cr外來學繼承 inheritance
x, y =[],[] #宣告二陣列[...]
k = s.get() #取得 ge t按鈕選單的選擇變數
u = 2 * pi / k #模組 math 圓周率 pi
for i in range(k):
x.append(cx + cr*cos(i*u)) #加入陣列的元素
y.append(cy + cr*sin(i*u))
for i in range(k):
for j in range(i+2, k):
canvas.create_line(x[i], y[i], x[j], y[j], fill="tomato", width=3)
s = IntVar(tk)
combo = OptionMenu(tk, s, *t, command = show).pack() #下拉式按鈕combobox
button = Button(tk, text="對角線", command = diagonal).pack()#按鈕button
tk.mainloop()
劉任昌學習HTML與STYLE 學習HTML心得 程式語言很好玩,我學得樂在其中。 學習Java程式語言 public class Main { public static void main(String[] args) { System.out.println("Hello World Java,劉任昌正在學Java."); } } /*C, CSS, Java, JavaScript用來表達註解的方式都一樣,Java特徵類別class,即使主程式main*/
w3schools截圖 w3schools程式碼 #劉任昌 字典 keys:value市場價值最大的公司 a = { 2330: "台積電", 2317: "鴻海", 2454: "聯發科", 2412: "中華電", 6505:"台塑化",2308: "台達電"} print(a) print("迴圈列出字典的所有值") for t in a: print(a[t]) b = a.copy() #字典不能直接assign print(b) a.update({2881:"富邦金控"})#台灣第七大 a.update({2303:"聯電"}) #台灣大八大 for t in a: print(a[t]) a.setdefault(1303,"南亞") a.setdefault(2882,"國泰金") i = 0 for t in a: #python迴圈不使用{...}縮排整齊整齊 i = i + 1 print("台灣第" + str(i) + a[t]) w3schools字典方法列表 Python has a set of built-in methods that you can use on dictionaries. Method Description clear() 移除字典內容Removes all the elements from the dictionary copy() 拷貝Returns a copy of the dictionary fromkeys() Returns a dictionary with the specified keys and value get() 取得鍵Returns the value of the specified key items() Returns a list containing a tuple for each key value pair keys() Returns a lis...
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