Current File : //lib64/python2.7/site-packages/gi/__init__.py
# -*- Mode: Python; py-indent-offset: 4 -*-
# vim: tabstop=4 shiftwidth=4 expandtab
#
# Copyright (C) 2005-2009 Johan Dahlin <johan@gnome.org>
#
# 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
from __future__ import absolute_import
# support overrides in different directories than our gi module
from pkgutil import extend_path
__path__ = extend_path(__path__, __name__)
import sys
import os
import importlib
# we can't have pygobject 2 loaded at the same time we load the internal _gobject
if 'gobject' in sys.modules:
raise ImportError('When using gi.repository you must not import static '
'modules like "gobject". Please change all occurrences '
'of "import gobject" to "from gi.repository import GObject".')
from . import _gi
from ._gi import _gobject
from ._gi import _API
from ._gi import Repository
from ._gi import PyGIDeprecationWarning
from ._gi import PyGIWarning
_API = _API # pyflakes
PyGIDeprecationWarning = PyGIDeprecationWarning
PyGIWarning = PyGIWarning
_versions = {}
_overridesdir = os.path.join(os.path.dirname(__file__), 'overrides')
version_info = _gobject.pygobject_version[:]
__version__ = "{0}.{1}.{2}".format(*version_info)
def check_version(version):
if isinstance(version, str):
version_list = tuple(map(int, version.split(".")))
else:
version_list = version
if version_list > version_info:
raise ValueError((
"pygobject's version %s required, and available version "
"%s is not recent enough") % (version, __version__)
)
def require_version(namespace, version):
""" Ensures the correct versions are loaded when importing `gi` modules.
:param namespace: The name of module to require.
:type namespace: str
:param version: The version of module to require.
:type version: str
:raises ValueError: If module/version is already loaded, already required, or unavailable.
:Example:
.. code-block:: python
import gi
gi.require_version('Gtk', '3.0')
"""
repository = Repository.get_default()
if namespace in repository.get_loaded_namespaces():
loaded_version = repository.get_version(namespace)
if loaded_version != version:
raise ValueError('Namespace %s is already loaded with version %s' %
(namespace, loaded_version))
if namespace in _versions and _versions[namespace] != version:
raise ValueError('Namespace %s already requires version %s' %
(namespace, _versions[namespace]))
available_versions = repository.enumerate_versions(namespace)
if not available_versions:
raise ValueError('Namespace %s not available' % namespace)
if version not in available_versions:
raise ValueError('Namespace %s not available for version %s' %
(namespace, version))
_versions[namespace] = version
def require_versions(requires):
""" Utility function for consolidating multiple `gi.require_version()` calls.
:param requires: The names and versions of modules to require.
:type requires: dict
:Example:
.. code-block:: python
import gi
gi.require_versions({'Gtk': '3.0', 'GLib': '2.0', 'Gio': '2.0'})
"""
for module_name, module_version in requires.items():
require_version(module_name, module_version)
def get_required_version(namespace):
return _versions.get(namespace, None)
def require_foreign(namespace, symbol=None):
"""Ensure the given foreign marshaling module is available and loaded.
:param str namespace:
Introspection namespace of the foreign module (e.g. "cairo")
:param symbol:
Optional symbol typename to ensure a converter exists.
:type symbol: str or None
:raises: ImportError
:Example:
.. code-block:: python
import gi
import cairo
gi.require_foreign('cairo')
"""
try:
_gi.require_foreign(namespace, symbol)
except Exception as e:
raise ImportError(str(e))
importlib.import_module('gi.repository', namespace)
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