for i, true_label in enumerate(label_mapping.values()): AttributeError: 'set' object has no attribute 'values'
时间: 2023-08-05 19:05:11 浏览: 95
您遇到的错误是由于尝试在一个集合对象上调用`values()`方法引起的。集合对象没有`values()`方法,而是字典对象有`values()`方法。
要解决这个问题,您需要将`label_mapping`从一个集合对象转换为一个字典对象。您可以使用`dict()`函数来完成转换,如下所示:
```python
label_mapping = dict(label_mapping)
```
然后,您就可以在循环中使用`label_mapping.values()`了。
完整的代码示例:
```python
label_mapping = {'a', 'b', 'c'}
label_mapping = dict(label_mapping)
for i, true_label in enumerate(label_mapping.values()):
# 在这里执行循环操作
print(i, true_label)
```
请注意,在转换集合对象为字典对象之后,元素的顺序可能会发生变化。如果您需要保持元素的顺序,请考虑使用有序集合对象,如`list`或`tuple`。
相关问题
for header in headers.items(): AttributeError: set object has no attribute items
这个错误通常是因为 `headers` 变量是一个集合(set)类型,而集合类型并没有 `items()` 方法。
如果你想要迭代集合中的元素并以键值对的形式返回,可以使用 `enumerate()` 方法。例如:
```python
for i, header in enumerate(headers):
print(f"Header {i}: {header}")
```
如果你想要将集合类型转换为字典类型,可以使用 `dict()` 方法。例如:
```python
headers_dict = dict(headers)
for key, value in headers_dict.items():
print(f"{key}: {value}")
```
请帮我将这段代码改为设置4个固定的NPC代码# Spawn vehicles # -------------- batch = [] for n, transform in enumerate(spawn_points): print('n',n) print('transform',transform) if n >= args.number_of_vehicles: break blueprint = random.choice(blueprints) print('blueprints的长度', len(blueprints)) print('blueprints',blueprints) print('blueprint', blueprint) if blueprint.has_attribute('color'): color = random.choice(blueprint.get_attribute('color').recommended_values) blueprint.set_attribute('color', color) if blueprint.has_attribute('driver_id'): driver_id = random.choice(blueprint.get_attribute('driver_id').recommended_values) blueprint.set_attribute('driver_id', driver_id) blueprint.set_attribute('role_name', 'autopilot') # prepare the light state of the cars to spawn light_state = vls.NONE if args.car_lights_on: light_state = vls.Position | vls.LowBeam | vls.LowBeam # spawn the cars and set their autopilot and light state all together batch.append(SpawnActor(blueprint, transform) .then(SetAutopilot(FutureActor, True, traffic_manager.get_port())) .then(SetVehicleLightState(FutureActor, light_state))) for response in client.apply_batch_sync(batch, synchronous_master): if response.error: logging.error(response.error) else: vehicles_list.append(response.actor_id)
你可以使用以下代码设置4个固定的NPC车辆:
```
# Spawn vehicles
# --------------
batch = []
# Define the spawn points for the NPC vehicles
spawn_points = [
carla.Transform(carla.Location(x=10, y=10, z=0), carla.Rotation()),
carla.Transform(carla.Location(x=20, y=20, z=0), carla.Rotation()),
carla.Transform(carla.Location(x=30, y=30, z=0), carla.Rotation()),
carla.Transform(carla.Location(x=40, y=40, z=0), carla.Rotation())
]
for n, transform in enumerate(spawn_points):
if n >= 4: # Spawn only 4 NPC vehicles
break
blueprint = random.choice(blueprints)
if blueprint.has_attribute('color'):
color = random.choice(blueprint.get_attribute('color').recommended_values)
blueprint.set_attribute('color', color)
if blueprint.has_attribute('driver_id'):
driver_id = random.choice(blueprint.get_attribute('driver_id').recommended_values)
blueprint.set_attribute('driver_id', driver_id)
blueprint.set_attribute('role_name', 'autopilot')
# prepare the light state of the cars to spawn
light_state = vls.NONE
if args.car_lights_on:
light_state = vls.Position | vls.LowBeam | vls.LowBeam
# spawn the cars and set their autopilot and light state all together
batch.append(SpawnActor(blueprint, transform)
.then(SetAutopilot(FutureActor, True, traffic_manager.get_port()))
.then(SetVehicleLightState(FutureActor, light_state)))
for response in client.apply_batch_sync(batch, synchronous_master):
if response.error:
logging.error(response.error)
else:
vehicles_list.append(response.actor_id)
```
在这里,我们手动定义了4个NPC车辆的初始位置,并将其存储在`spawn_points`列表中。然后,我们遍历`spawn_points`列表,仅生成4个NPC车辆。每个NPC车辆的蓝图和外观随机选择,但我们将其角色设置为“autopilot”,以使其自动驾驶。最后,我们将生成的NPC车辆的ID存储在`vehicles_list`列表中。
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