python三角形判定怎么做

a = int(input("The length of the side a = "))
b = int(input("The length of the side b = "))
c = int(input("The length of the side c = "))
if a != b and b != c and a != c:
    print("This is Scalene") #不规则三角形
elif a == b and b == c:
    print("This is an Equilateral") #等边三角形
else:
    print("This is Isosceles") #等腰三角形

The length of the side a = 3
The length of the side b = 4
The length of the side c = 5
This is Scalene
The length of the side a = 3
The length of the side b = 3
The length of the side c = 3
This is an Equilateral
The length of the side a = 3
The length of the side b = 3
The length of the side c = 4
This is Isosceles