Debugging 如何用一堆错误来限制代码，特别是这里的代码？I'；我真的很困惑

所以我在上python实验课，我们刚刚开始讨论调试错误。我正在阅读实验室的资料，试图按照它告诉我的去做，但我不知道如何通过“狼篱笆”代码来发现错误，我只是总的来说感到困惑

import math

这里说，我需要使用errlog方法，并使用wolf fensing来识别错误，我不知道该怎么做，因为实验室讲师没有给我们任何可以处理的东西

## @TODO - add the errlog method and use wolf fencing to identify the errors in this code
 


def validate_triangle(sides):
     return True

 def get_angle(sides):


# Using the law of cosines
#  c^2 = a^2 + b^2 - 2abcos(C)
#  cos(C) = (a^2 + b^2 - c^2)/(2ab)

a = sides[0]
b = sides[1]
c = sides[2]

num = math.pow(a, 2) + math.pow(b, 2) + math.pow(c, 2)
den = 2*a*b

val = num/den

angle = math.acos(val)

return angle

 def get_height(sides):


C = get_angle(sides) # angle formed by sides a and b, opposite side c
height = sides[0]*math.sin(C)
return height

def get_area(sides):


base = sides[1]
height = get_height(sides)
area = (1/2.)*base*height
return area

 def get_area_heron(sides):

if (not validate_triangle(sides)):
    return None

a  = sides[0]
b  = sides[1]
c  = sides[2]
s  = 0.5*(a + b + c)
area = math.sqrt(s*(s-a)*(s-b)*(s-c))
return area

print('name is',__name__)
if __name__ == "__main__":
  sides = (3, 4, 5)
  areaHeron = get_area_heron(sides) # This should be 6.0
  area = get_area(sides)
print('Area of triangle with sides={} is {} {}'.format(str(sides), str(area), str(areaHeron)))

sides = (4, 5, 3)
areaHeron = get_area_heron(sides) # This should be 6.0 (same as 3,4,5)
area = get_area(sides)
print('Area of triangle with sides={} is {} {}'.format(str(sides), str(area), str(areaHeron)))

sides = (2, 2, 2*math.sqrt(2)) # equilateral right triangle
areaHeron = get_area_heron(sides) # This should be 2.0
area = get_area(sides)
print('Area of triangle with sides={} is {} {}'.format(str(sides), str(area), str(areaHeron)))

sides = (4, 4, 5) # This is an invalid triangle
areaHeron = get_area_heron(sides) #
area = get_area(sides)
print('Area of triangle with sides={} is {} {}'.format(str(sides), str(area), str(areaHeron)))

sides = (3, 4, 8) # This is an invalid triangle
areaHeron = get_area_heron(sides) # This should be None
area = get_area(sides)
print('Area of triangle with sides={} is {} {}'.format(str(sides), str(area), str(areaHeron)))

sides = (3, 4) # This is an invalid triangle
areaHeron = get_area_heron(sides) # This should be None
area = get_area(sides)
print('Area of triangle with sides={} is {} {}'.format(str(sides), str(area), str(areaHeron)))