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Upsilon/scripts/device/usb/__init__.py

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# Copyright (C) 2009-2017 Wander Lairson Costa
# Copyright (C) 2017-2018 Robert Wlodarczyk
#
# 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.
r"""PyUSB - Easy USB access in Python
This package exports the following modules and subpackages:
core - the main USB implementation
legacy - the compatibility layer with 0.x version
backend - the support for backend implementations.
control - USB standard control requests.
libloader - helper module for backend library loading.
Since version 1.0, main PyUSB implementation lives in the 'usb.core'
module. New applications are encouraged to use it.
"""
import logging
import os
__author__ = 'Wander Lairson Costa'
# Use Semantic Versioning, http://semver.org/
version_info = (1, 0, 2)
__version__ = '%d.%d.%d' % version_info
__all__ = ['legacy', 'control', 'core', 'backend', 'util', 'libloader']
def _setup_log():
from usb import _debug
logger = logging.getLogger('usb')
debug_level = os.getenv('PYUSB_DEBUG')
if debug_level is not None:
_debug.enable_tracing(True)
filename = os.getenv('PYUSB_LOG_FILENAME')
LEVELS = {'debug': logging.DEBUG,
'info': logging.INFO,
'warning': logging.WARNING,
'error': logging.ERROR,
'critical': logging.CRITICAL}
level = LEVELS.get(debug_level, logging.CRITICAL + 10)
logger.setLevel(level = level)
try:
handler = logging.FileHandler(filename)
except:
handler = logging.StreamHandler()
fmt = logging.Formatter('%(asctime)s %(levelname)s:%(name)s:%(message)s')
handler.setFormatter(fmt)
logger.addHandler(handler)
else:
class NullHandler(logging.Handler):
def emit(self, record):
pass
# We set the log level to avoid delegation to the
# parent log handler (if there is one).
# Thanks to Chris Clark to pointing this out.
logger.setLevel(logging.CRITICAL + 10)
logger.addHandler(NullHandler())
_setup_log()
# We import all 'legacy' module symbols to provide compatibility
# with applications that use 0.x versions.
from usb.legacy import *