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Edit File : _errors.py \| Size : 5.11 KB
# -- coding: utf-8 -- # Copyright (C) 2015 mulhern <amulhern@redhat.com> # This library 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 2.1 of the License, or (at your # option) any later version. # This library 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 this library; if not, write to the Free Software Foundation, # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA """ pyudev.device._errors ===================== Errors raised by Device methods. .. moduleauthor:: Sebastian Wiesner <lunaryorn@gmail.com> """ from __future__ import absolute_import from __future__ import division from __future__ import print_function from __future__ import unicode_literals import abc from six import add_metaclass @add_metaclass(abc.ABCMeta) class DeviceError(Exception): """ Any error raised when messing around w/ or trying to discover devices. """ @add_metaclass(abc.ABCMeta) class DeviceNotFoundError(DeviceError): """ An exception indicating that no :class:`Device` was found. .. versionchanged:: 0.5 Rename from ``NoSuchDeviceError`` to its current name. """ class DeviceNotFoundAtPathError(DeviceNotFoundError): """ A :exc:`DeviceNotFoundError` indicating that no :class:`Device` was found at a given path. """ def __init__(self, sys_path): DeviceNotFoundError.__init__(self, sys_path) @property def sys_path(self): """ The path that caused this error as string. """ return self.args[0] def __str__(self): return 'No device at {0!r}'.format(self.sys_path) class DeviceNotFoundByFileError(DeviceNotFoundError): """ A :exc:`DeviceNotFoundError` indicating that no :class:`Device` was found from the given filename. """ class DeviceNotFoundByInterfaceIndexError(DeviceNotFoundError): """ A :exc:`DeviceNotFoundError` indicating that no :class:`Device` was found from the given interface index. """ class DeviceNotFoundByKernelDeviceError(DeviceNotFoundError): """ A :exc:`DeviceNotFoundError` indicating that no :class:`Device` was found from the given kernel device string. The format of the kernel device string is defined in the systemd.journal-fields man pagees. """ class DeviceNotFoundByNameError(DeviceNotFoundError): """ A :exc:`DeviceNotFoundError` indicating that no :class:`Device` was found with a given name. """ def __init__(self, subsystem, sys_name): DeviceNotFoundError.__init__(self, subsystem, sys_name) @property def subsystem(self): """ The subsystem that caused this error as string. """ return self.args[0] @property def sys_name(self): """ The sys name that caused this error as string. """ return self.args[1] def __str__(self): return 'No device {0.sys_name!r} in {0.subsystem!r}'.format(self) class DeviceNotFoundByNumberError(DeviceNotFoundError): """ A :exc:`DeviceNotFoundError` indicating, that no :class:`Device` was found for a given device number. """ def __init__(self, typ, number): DeviceNotFoundError.__init__(self, typ, number) @property def device_type(self): """ The device type causing this error as string. Either ``'char'`` or ``'block'``. """ return self.args[0] @property def device_number(self): """ The device number causing this error as integer. """ return self.args[1] def __str__(self): return ('No {0.device_type} device with number ' '{0.device_number}'.format(self)) class DeviceNotFoundInEnvironmentError(DeviceNotFoundError): """ A :exc:`DeviceNotFoundError` indicating, that no :class:`Device` could be constructed from the process environment. """ def __str__(self): return 'No device found in environment' class DeviceValueError(DeviceError): """ Raised when a parameter has an unacceptable value. May also be raised when the parameter has an unacceptable type. """ _FMT_STR = "value '%s' for parameter %s is unacceptable" def __init__(self, value, param, msg=None): """ Initializer. :param object value: the value :param str param: the parameter :param str msg: an explanatory message """ # pylint: disable=super-init-not-called self._value = value self._param = param self._msg = msg def __str__(self): if self._msg: fmt_str = self._FMT_STR + ": %s" return fmt_str % (self._value, self._param, self._msg) else: return self._FMT_STR % (self._value, self._param) Back

Edit File : _errors.py | Size : 5.11 KB

# -*- coding: utf-8 -*-
# Copyright (C) 2015 mulhern <amulhern@redhat.com>

# This library 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 2.1 of the License, or (at your
# option) any later version.

# This library 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 this library; if not, write to the Free Software Foundation,
# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

"""
    pyudev.device._errors
    =====================

Errors raised by Device methods.

.. moduleauthor:: Sebastian Wiesner <lunaryorn@gmail.com>
"""

from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
from __future__ import unicode_literals

import abc

from six import add_metaclass

@add_metaclass(abc.ABCMeta)
class DeviceError(Exception):
    """
    Any error raised when messing around w/ or trying to discover devices.
    """

@add_metaclass(abc.ABCMeta)
class DeviceNotFoundError(DeviceError):
    """
    An exception indicating that no :class:`Device` was found.

.. versionchanged:: 0.5
       Rename from ``NoSuchDeviceError`` to its current name.
    """

class DeviceNotFoundAtPathError(DeviceNotFoundError):
    """
    A :exc:`DeviceNotFoundError` indicating that no :class:`Device` was
    found at a given path.
    """

def __init__(self, sys_path):
        DeviceNotFoundError.__init__(self, sys_path)

@property
    def sys_path(self):
        """
        The path that caused this error as string.
        """
        return self.args[0]

def __str__(self):
        return 'No device at {0!r}'.format(self.sys_path)

class DeviceNotFoundByFileError(DeviceNotFoundError):
    """
    A :exc:`DeviceNotFoundError` indicating that no :class:`Device` was
    found from the given filename.
    """

class DeviceNotFoundByInterfaceIndexError(DeviceNotFoundError):
    """
    A :exc:`DeviceNotFoundError` indicating that no :class:`Device` was found
    from the given interface index.
    """

class DeviceNotFoundByKernelDeviceError(DeviceNotFoundError):
    """
    A :exc:`DeviceNotFoundError` indicating that no :class:`Device` was found
    from the given kernel device string.

The format of the kernel device string is defined in the
    systemd.journal-fields man pagees.
    """

class DeviceNotFoundByNameError(DeviceNotFoundError):
    """
    A :exc:`DeviceNotFoundError` indicating that no :class:`Device` was
    found with a given name.
    """

def __init__(self, subsystem, sys_name):
        DeviceNotFoundError.__init__(self, subsystem, sys_name)

@property
    def subsystem(self):
        """
        The subsystem that caused this error as string.
        """
        return self.args[0]

@property
    def sys_name(self):
        """
        The sys name that caused this error as string.
        """
        return self.args[1]

def __str__(self):
        return 'No device {0.sys_name!r} in {0.subsystem!r}'.format(self)

class DeviceNotFoundByNumberError(DeviceNotFoundError):
    """
    A :exc:`DeviceNotFoundError` indicating, that no :class:`Device` was found
    for a given device number.
    """

def __init__(self, typ, number):
        DeviceNotFoundError.__init__(self, typ, number)

@property
    def device_type(self):
        """
        The device type causing this error as string.  Either ``'char'`` or
        ``'block'``.
        """
        return self.args[0]

@property
    def device_number(self):
        """
        The device number causing this error as integer.
        """
        return self.args[1]

def __str__(self):
        return ('No {0.device_type} device with number '
                '{0.device_number}'.format(self))

class DeviceNotFoundInEnvironmentError(DeviceNotFoundError):
    """
    A :exc:`DeviceNotFoundError` indicating, that no :class:`Device` could
    be constructed from the process environment.
    """

def __str__(self):
        return 'No device found in environment'

class DeviceValueError(DeviceError):
    """
    Raised when a parameter has an unacceptable value.

May also be raised when the parameter has an unacceptable type.
    """

_FMT_STR = "value '%s' for parameter %s is unacceptable"

def __init__(self, value, param, msg=None):
        """ Initializer.

:param object value: the value
            :param str param: the parameter
            :param str msg: an explanatory message
        """
        # pylint: disable=super-init-not-called
        self._value = value
        self._param = param
        self._msg = msg

def __str__(self):
        if self._msg:
            fmt_str = self._FMT_STR + ": %s"
            return fmt_str % (self._value, self._param, self._msg)
        else:
            return self._FMT_STR % (self._value, self._param)

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