李珞寧,殖利率,債券價格,Macaulay存續期間

Macaulay Duration=-(Delta P)/(Delta y)*(1+y)/P

Modified Duration=-(Delta P)/(Delta y)/P

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李珞寧python建立tkinter視窗控制其他視窗

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from tkinter import * #從tkinter函式庫輸入所有函式,檔案'window001.py' import time #412單元延續數入time套件 def delete(): #增加自訂函數def delete() List[int(n.get())-1].destroy() #destroy破壞視窗List[索引] x=('龍','龓','龕','龖','龘') #建立元祖tuple名為x,0,1,2,3,4,5 List = [] #建立串列list名為List for i in range(5): window = Tk() window.title('李珞寧第%d個視窗' % (i+1)) xpos = i*300 window.geometry('300x300+%d+0' % xpos) b1=Label(window,text=x[i],font='Arial 200 bold').pack() window.update() time.sleep(0.1) List.append(window) #新增指令:將視窗存在串列List window=Tk() window.geometry('400x300+0+400') window.title('李珞寧第%d個新視窗控制原來的視窗' % (i+1)) n = StringVar(window) n.set('刪除') op1 = OptionMenu(window,n,1,2,3,4,5).pack() bu1 = Button(window,text='刪除選取視窗',command=delete,font='20',bg='blue',fg='white') bu1.pack() mainloop()
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李珞寧python內建built-in函數function迴圈loop範圍range

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程式碼 print("練習函數bin, hex, integer") print("4轉二進位",bin(4)) print("7轉二進位",bin(7)) print(4+2+1) print("20轉成16進位",hex(20)) print("FF轉成10進位",int("FF",16)) print("練習函數abs, all, any, ascii") for i in range(-2,3): x = abs(i) print(abs(x)) print("all邏輯,是否全部是真?") x, y, z = 1==1, 2>1, 3>2 #=給值,==判斷 print(all([x,y,z])) print("2>1,-1==1,-2>3有正確的嗎",any([2>1, -1==1, -2>3])) print("2>1,-1==1,-2>3全正確嗎",all([2>1, -1==1, -2>3])) #pthon註解range(開始,結束) print("列印,迴圈for, range範圍") for i in range(33301, 33344): print("字碼character", i,"是",chr(i)) for i in range(65, 70): print(chr(i)) w3schools內建函數列表 href="https://www.w3schools.com/python/python_ref_functions.asp"   Python has a set of built-in functions. Function Description abs() Returns the absolute value of a number all() Returns True if all items in an iterable object ar...
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