src/lerobot/errors.py

# Copyright 2024 The HuggingFace Inc. team. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.


class DeviceNotConnectedError(ConnectionError):
    """Exception raised when the device is not connected."""

    def __init__(self, message="This device is not connected. Try calling `connect()` first."):
        self.message = message
        super().__init__(self.message)


class DeviceAlreadyConnectedError(ConnectionError):
    """Exception raised when the device is already connected."""

    def __init__(
        self,
        message="This device is already connected. Try not calling `connect()` twice.",
    ):
        self.message = message
        super().__init__(self.message)


class InvalidActionError(ValueError):
    """Exception raised when an action is already invalid."""

    def __init__(
        self,
        message="The action is invalid. Check the value follows what it is expected from the action space.",
    ):
        self.message = message
        super().__init__(self.message)