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# -*- Mode: Python; py-indent-offset: 4 -*-
# pygtk - Python bindings for the GTK toolkit.
# Copyright (C) 2006 Johan Dahlin
#
# 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 Street, Fifth Floor, Boston, MA 02110-1301
# USA
# Private to PyGTK, do not use in applications
import sys
from types import ModuleType
class LazyModule(object):
def __init__(self, name, locals):
self._name = name
self._locals = locals
self._modname = '%s.%s' % (self._locals.get('__name__'), self._name)
def __getattr__(self, attr):
module = __import__(self._name, self._locals, {}, ' ')
sys.modules[self._modname] = module
if attr == '__members__':
return dir(module)
return getattr(module, attr)
class _NotLoadedMarker:
pass
_marker = _NotLoadedMarker()
class LazyDict(dict):
def __init__(self, module):
self._module = module
dict.__init__(self)
def __getitem__(self, name):
print name
return getattr(self._module, name)
class LazyNamespace(ModuleType):
def __init__(self, module, locals):
ModuleType.__init__(self, locals['__name__'])
self._imports = {}
ns = self.__dict__
ns.update(locals)
ns['__module__'] = self
lazy_symbols = {}
for symbol in module._get_symbol_names():
lazy_symbols[symbol] = ns[symbol] = _marker
ns.update(__dict__=LazyDict(self),
__bases__=(ModuleType,),
add_submodule=self.add_submodule)
def __getattribute__(_, name):
v = ns.get(name, _marker)
if v is not _marker:
return v
if name in lazy_symbols:
s = module._get_symbol(ns, name)
return s
elif name in self._imports:
m = __import__(self._imports[name], {}, {}, ' ')
ns[name] = m
return m
raise AttributeError(name)
LazyNamespace.__getattribute__ = __getattribute__
def add_submodule(self, name, importname):
self._imports[name] = importname
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