[英]How do I make this class accept list/tuple of ints as arguments?
我尝试将我从输入中获得的变量(即 (x,y,z) 作为整数)成功转换为元组和列表,但我似乎无法让Polynomial()
与它们一起工作。
from tkinter import *
class Polynomial:
def __init__(self, *coefficients):
self.coefficients = list(coefficients)
def __repr__(self):
return "Polynomial" + str(self.coefficients)
def __call__(self, x):
res = 0
for index, coeff in enumerate(self.coefficients[::-1]):
res += coeff * x ** index
return res
def calculateIt():
mathCoef = E1.get()
botch = mathCoef
mytuple = tuple(map(int, botch.split(',')))
p = Polynomial(mytuple)
for x in range(-3, 3):
print(x, p(x))
L1.configure(text=p)
print(mathCoef)
window = Tk()
window.title("XImath Client 1.0")
window.configure(bg="black")
window.geometry("500x500")
L1 = Label(window, text="Input")
L1.pack()
E1 = Entry(window, bd=5)
E1.pack()
B1 = Button(window, text="go", command=calculateIt)
B1.pack()
window.mainloop()
问题是我希望class(Polynomial)
使用mathCoef
用户输入给出的变量,它最初是一个字符串。 我尝试成功地变成一个元组,但是class(Polynomial)
期望使用这种语法的整数 - (1, 2, 3)
。 假设用户输入 1,2,3 - 元组看起来完全像这样 - (1, 2, 3)
,但是当我尝试将它传递给Polynomial(mytuple)
,它返回:
TypeError: unsupported operand type(s) for +=: 'int' and 'tuple'
如何将元组转换为用逗号分隔的整数?
试试下面的代码。
我相信您可能缺少的是p = Polynomial(*coeffs)
行中的 * ,它告诉 python 将列表解压缩为传递给类构造函数的参数。
我还在将多项式添加到标签的行中添加了repr(p)
,这将显示该多项式的 repr 字符串。
from tkinter import *
class Polynomial:
def __init__(self, *coefficients):
self.coefficients = list(coefficients)
def __repr__(self):
return "Polynomial" + str(self.coefficients)
def __call__(self, x):
res = 0
for index, coeff in enumerate(self.coefficients[::-1]):
res += coeff * x ** index
return res
def calculateIt():
mathCoef = E1.get()
coeffs = map(int, mathCoef.split(' '))
p = Polynomial(*coeffs)
for x in range(-3, 3):
print(x, p(x))
L1.configure(text=repr(p))
print(mathCoef)
window = Tk()
window.title("XImath Client 1.0")
window.configure(bg="black")
window.geometry("500x500")
L1 = Label(window, text="Input")
L1.pack()
E1 = Entry(window, bd=5)
E1.pack()
B1 = Button(window, text="go", command=calculateIt)
B1.pack()
window.mainloop()
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