林姵語python,print,input,字串方法[::-1]
#註解:林姵語2023/02/20
print("在 Dcard出征劉任昌")
a="聽說他給女生分數比較高"
print(a)
b = a[2:9:]#方法取字串a第3到第8字元
print(b)
c = a[2:9:2]
print(c)
d = a[2:9:-1]
print(d)
林姵語python運算CSV輸出TKINTER投資風險與報酬Markowitz
關鍵程式碼 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="林姵語繪圖 ",font=('Arial',30,'bold'), command = draw, bg='black',fg='white').pack(side=LEFT) button2 = Button(tk, text="林姵語刪除...
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