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# Hydrogram - Telegram MTProto API Client Library for Python

# This file is part of Hydrogram.

# Hydrogram is free software: you can redistribute it and/or modify

# it under the terms of the GNU Lesser General Public License as published

# by the Free Software Foundation, either version 3 of the License, or

# (at your option) any later version.

# Hydrogram is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

# GNU Lesser General Public License for more details.

# You should have received a copy of the GNU Lesser General Public License

# along with Hydrogram. If not, see <http://www.gnu.org/licenses/>.

from __future__ import annotations

from collections.abc import Iterable

from typing import TYPE_CHECKING, Callable

from .handler import Handler

if TYPE_CHECKING:

import hydrogram

class ErrorHandler(Handler):

"""The Error handler class. Used to handle errors.

It is intended to be used with :meth:`~hydrogram.Client.add_handler`

For a nicer way to register this handler, have a look at the

:meth:`~hydrogram.Client.on_error` decorator.

Parameters:

callback (``Callable``):

Pass a function that will be called when a new Error arrives. It takes *(client, error)*

as positional arguments (look at the section below for a detailed description).

errors (``Exception`` | Iterable of ``Exception``, *optional*):

Pass one or more exception classes to allow only a subset of errors to be passed

in your callback function.

Other parameters:

client (:obj:`~hydrogram.Client`):

The Client itself, useful when you want to call other API methods inside the error handler.

error (``Exception``):

The error that was raised.

update (:obj:`~hydrogram.Update`):

The update that caused the error.

"""

def __init__(

self, callback: Callable, errors: type[Exception] | Iterable[type[Exception]] | None = None

if errors is None:

errors = [Exception]

elif not isinstance(errors, Iterable):

errors = [errors]

self.errors = errors

super().__init__(callback)

async def check(self, client: hydrogram.Client, error: Exception):

return any(isinstance(error, e) for e in self.errors)

def check_remove(self, error: Exception):

return self.errors == error or any(isinstance(error, e) for e in self.errors)

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