Traceback (most recent call last): File "C:/Users/lmx/PycharmProjects/pythonProject/1.py", line 539, in <module> main(demand_file=demand_file, depot_file=depot_file, epochs=250, v_cap=3) File "C:/Users/lmx/PycharmProjects/pythonProject/1.py", line 503, in main 众包车辆路径 [['d2', 7, 23], ['d3', 11, 27], ['d4', 5, 21]] [['d1', 10, 26, 1, 17, 2, 18, 3, 19, 4, 20, 'd1'], ['d1', 8, 24, 6, 22, 'd1'], ['d1', 15, 31, 'd1'], ['d1', 12, 28, 9, 25, 13, 29, 'd1'], ['d1', 16, 32, 14, 30, 'd1']] [['d1', 15, 31, 'd1'], ['d1', 12, 28, 9, 25, 13, 29, 'd1'], ['d1', 16, 32, 14, 30, 'd1'], ['d1', 8, 24, 5, 21, 'd1'], ['d1', 10, 26, 1, 17, 2, 18, 3, 19, 4, 20, 'd1']] res1 = local_search_one(crowd_route_list1, route_list1, sol, model, node) File "C:/Users/lmx/PycharmProjects/pythonProject/1.py", line 412, in local_search_one owncar_route = random.choice(route_list) File "C:\Users\lmx\Anaconda3\lib\random.py", line 261, in choice raise IndexError('Cannot choose from an empty sequence') from None IndexError: Cannot choose from an empty sequence
时间: 2023-07-02 22:14:08 浏览: 80
这个错误是因为你在使用 `random.choice` 时,传入的序列是空的,因此无法从中选择任何元素。
你需要检查一下你的 `route_list` 是否为空。如果是空的,你需要在调用 `random.choice` 之前,加入一个判断语句来避免这个错误的发生。例如:
```python
if not route_list:
# 处理空序列的情况
else:
owncar_route = random.choice(route_list)
```
相关问题
Traceback ( most recent call last ) :File " C:/python/kfc.py " , line 8
Traceback (most recent call last): File "C:/python/kfc.py", line 8
这是Python中的错误追踪信息,通常在程序出现错误时会显示。它告诉我们在哪个文件的哪一行出现了错误。
具体来说,"Traceback (most recent call last)" 表示错误追踪的开始,它告诉我们下面的信息是最近一次调用的错误。
"File "C:/python/kfc.py", line 8" 表示错误发生在文件 "C:/python/kfc.py" 的第8行。
如果你想解决这个错误,可以打开 "C:/python/kfc.py" 文件,并检查第8行的代码,看看是否有语法错误或逻辑错误。
C:\Users\lmx\Anaconda3\python.exe C:/Users/lmx/PycharmProjects/pythonProject/1.py Traceback (most recent call last): File "C:/Users/lmx/PycharmProjects/pythonProject/1.py", line 539, in <module> main(demand_file=demand_file, depot_file=depot_file, epochs=250, v_cap=3) File "C:/Users/lmx/PycharmProjects/pythonProject/1.py", line 503, in main res1 = local_search_one(crowd_route_list1, route_list1, sol, model, node) File "C:/Users/lmx/PycharmProjects/pythonProject/1.py", line 424, in local_search_one a1 = checkPriority(owncar_route) File "C:/Users/lmx/PycharmProjects/pythonProject/1.py", line 273, in checkPriority if route[i] <= 16: TypeError: '<=' not supported between instances of 'str' and 'int'
这个错误是因为你在对一个字符串和整数进行比较时使用了 `<=` 操作符,但这两种类型是不可比较的。
你需要检查一下你的 `route` 这个列表中的元素类型是否正确。如果其中包含了字符串类型的元素,你需要将它们转换为整数类型或者将整数类型的元素转换为字符串类型,以保证它们能够正确比较。例如:
```python
if int(route[i]) <= 16:
# 执行相关操作
```
或者
```python
if str(route[i]) <= '16':
# 执行相关操作
```