蔡耀葳python,print,input,字串[::-1]

W3schools學習python

#蔡耀葳的第一個python程式2023/2/20 print("你在跟我哈啦?") #python輸出比Java簡單太多 a = "你在跟我哈啦,吃屎" #python指令結尾不需要;分號 b = '貓抓鼠,鼠抓貓' #phthon字串單引雙引號都可 print(a) print(b) c = a[1:5:] #取字串a的第1到5(不含),從0開始 print(c) c = a[::-1] print(c) a = input("自己輸入字串:") print("你輸入:"+a)
("反過來:"+a[::-1])

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蔡耀葳期末考馬可維茲風險平均數平面

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蔡耀葳期末考60分部分一定要給老師親眼看過

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Python 函數def 函數名稱: def draw(): canvas繪圖套件 create_line(x起點,y起點,x終點,y終點) def draw第二個delete def draw():#按下按鈕button1執行draw canvas.create_line(0,500,700,500,width=3,fill='black',arrow='last') canvas.create_line(10,600,10,5,width=3,fill='black',arrow='last') for firm in firms: t=(firm, year.get()) x = 10+20*stdev[t]*2*3**0.5 #放大20 y = 500 - 10*mean[t]*12 #放大10 dot=canvas.create_oval(x-5,y-5,x+5,y+5,fill='blue') lab=canvas.create_text(x+10,y,text=firm[4:7],anchor=W,font=('微軟中黑體', 16)) def delete():#按下按鈕button2執行delete canvas.delete('all') years=[x for x in range(2007, 2025)] year=IntVar(tk) year.set(years[0]) label = Label(tk, text="年度",font=('Arial',30,'bold'),).pack(side=LEFT) #距離左側 option1 = OptionMenu(tk, year, *years).pack(side=LEFT) button1 = Button(tk, text="賴青德繪圖 ",font=('Arial',30,'bold'), command = draw, bg='...
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