13e146d774
git-svn-id: svn://svn.cy55.de/Zope3/src/cybertools/trunk@2487 fd906abe-77d9-0310-91a1-e0d9ade77398
88 lines
2.3 KiB
Python
88 lines
2.3 KiB
Python
#
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# Copyright (c) 2008 Helmut Merz helmutm@cy55.de
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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"""
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Special namespaces for execution of Python code, e.g. for implementing
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configuration or export/import formats, or providing a restricted Python
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for scripts or an interactive interpreter.
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$Id$
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"""
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import traceback
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_not_found = object()
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class BaseNamespace(dict):
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builtins = 'dir', 'output'
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def __init__(self, *args, **kw):
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super(BaseNamespace, self).__init__(*args, **kw)
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self['__builtins__'] = {}
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for key in self.builtins:
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self[key] = getattr(self, key)
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def output(self, value):
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print value
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def dir(self, obj=None):
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if obj is None:
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return dir(self)
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return dir(obj)
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def __getitem__(self, key):
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result = self.get(key, _not_found)
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if result is _not_found:
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raise NameError(key)
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return result
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def __getattr__(self, key):
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result = self.get(key, _not_found)
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if result is _not_found:
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raise AttributeError(key)
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return result
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class Symbol(object):
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def __init__(self, namespace, name):
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self.namespace = namespace
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self.name = name
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def __str__(self):
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return self.name
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def __repr__(self):
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return "<Symbol '%s'>" % self.name
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class AutoNamespace(BaseNamespace):
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symbolFactory = Symbol
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def __getitem__(self, key):
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result = self.get(key, _not_found)
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if result is _not_found:
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result = getattr(self, key, _not_found)
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if result is _not_found:
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sym = Symbol(self, key)
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self[key] = sym
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return sym
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return result
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