求大佬解答一下，🙏🙏🙏

Question

import math x1=input("x1:") y1=input("y1:") x2=input("x2:") y2=input("y2:") x3=input("x3:") y3=input("y3:") x4=input("x4:") y4=input("y4:") i=((y1-y3)*(x4-x3)-(x1-x3)*(y4-y3)) j=((x2-x1)*(y4-y3)-(y2-y1)*(x4-x3)) k=((y1-y3)*(x2-x1)-(x1-x3)*(y2-y1)) z=((x2-x1)*(y4-y3)-(y2-y1)*(x4-x3)) r=i/j s=k/z px=(x1+r*(x2-x1)) py=(y1+r*(y2-y1)) if 0<=r<=1 & 0<=s<=1 : print("intersect crossover point}") elif i == 0: print("collineation") elif j == 0: print("parallel") else: print("disization") 错误：numbers = [float(i) for i in user_input.split(',')]

Answer 1

你输入的是字符串，字符串不能做运算，转成数字