#!/usr/bin/env python
# -*- coding: utf-8; py-indent-offset:4 -*-
###############################################################################
#
# Copyright (C) 2015-2020 Daniel Rodriguez
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
###############################################################################
from __future__ import (absolute_import, division, print_function,
                        unicode_literals)

# 从from error import * 的时候，只导入下面两个类BacktraderError和StrategySkipError
__all__ = ['BacktraderError', 'StrategySkipError']


# BacktraderError类
class BacktraderError(Exception):
    '''Base exception for all other exceptions'''
    pass

# StrategySkipError，只有这个类在cerebro中用到了
class StrategySkipError(BacktraderError):
    '''Requests the platform to skip this strategy for backtesting. To be
    raised during the initialization (``__init__``) phase of the instance'''
    pass

# ModuleImportError类
class ModuleImportError(BacktraderError):
    '''Raised if a class requests a module to be present to work and it cannot
    be imported'''
    def __init__(self, message, *args):
        super(ModuleImportError, self).__init__(message)
        self.args = args

# FromModuleImportError类
class FromModuleImportError(ModuleImportError):
    '''Raised if a class requests a module to be present to work and it cannot
    be imported'''
    def __init__(self, message, *args):
        super(FromModuleImportError, self).__init__(message, *args)