# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You 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
# 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.
libcloud provides a unified interface to the cloud computing resources.
:var __version__: Current version of libcloud
from libcloud.base import DriverType # NOQA
from libcloud.base import DriverTypeFactoryMap # NOQA
from libcloud.base import get_driver # NOQA
# TODO: This import is slow and adds overhead in situations when no
# requests are made but it's necessary for detecting bad version of
import requests # NOQA
have_requests = True
have_requests = False
__all__ = [
__version__ = '3.3.2-dev'
Enable library wide debugging to a file-like object.
:param fo: Where to append debugging information
:type fo: File like object, only write operations are used.
from libcloud.common.base import Connection
from libcloud.utils.loggingconnection import LoggingConnection
LoggingConnection.log = fo
Connection.conn_class = LoggingConnection
# Ensure the file handle is closed on exit
Utility function that is ran once on Library import.
This checks for the LIBCLOUD_DEBUG environment variable, which if it exists
is where we will log debug information about the provider transports.
This also checks for known environment/dependency incompatibilities.
path = os.getenv('LIBCLOUD_DEBUG')
mode = 'a'
# Special case for /dev/stderr and /dev/stdout on Python 3.
from libcloud.utils.py3 import PY3
# Opening those files in append mode will throw "illegal seek"
# exception there.
# Late import to avoid setup.py related side affects
if path in ['/dev/stderr', '/dev/stdout'] and PY3:
mode = 'w'
fo = codecs.open(path, mode, encoding='utf8')
# NOTE: We use lazy import to avoid unnecessary import time overhead
import paramiko # NOQA
have_paramiko = True
have_paramiko = False
if have_paramiko and hasattr(paramiko.util, 'log_to_file'):
# check for broken `yum install python-requests`
if have_requests and requests.__version__ == '2.6.0':
chardet_version = requests.packages.chardet.__version__
required_chardet_version = '2.3.0'
assert chardet_version == required_chardet_version, (
'Known bad version of requests detected! This can happen when '
'requests was installed from a source other than PyPI, e.g. via '
'a package manager such as yum. Please either install requests '
'from PyPI or run `pip install chardet==%s` to resolve this '
'issue.' % required_chardet_version