由于total_distance[counter4] = sum(d)
行,我收到此错误。我不知道是什么导致它,我有附加值到d,我只是将它们相加并将该值赋给数组中的索引。导致此错误的原因是什么?
total_distance= []
d=[]
all_city = []
lowest_distance = 0
for permutation in itertools.permutations(city,len(city)):
all_city.append(permutation)
for l in all_city:
z = []
q = 0
counter4 = 0
while q < len(city):
z.append(int(l[q]))
q = q+1
for m in z:
n = m - 1
first_index = 0
counter1 = 0
if counter < len(z):
checktime(initial_time1,time_limit1,total_distance)
if counter1 == 0:
first_index = n
d.append(math.sqrt(math.pow((int(float(x[n + 1])) - int(float(x[n]))), 2) + math.pow((int(float((y[n + 1]))) - int(float(y[n]))), 2)))
elif counter1 == len(z):
checktime(initial_time1, time_limit1,total_distance)
d.append(math.sqrt(math.pow((int(float(x[n]))-int(float(x[first_index]))), 2)+math.pow((int(float(y[n]))-int(float(y[first_index]))),2)))
counter1 = counter1 + 1
total_distance[counter4] = sum(d) # ERROR LINE
counter4 = counter4 + 1
答案 0 :(得分:0)
使用'append'将值添加到空列表。正如你之前所做的那样。
total_distance.append(sum(d))