Get rid of terribly old, no longer used module.

lib/python/Products/PageTemplates/ZPythonExpr.py

-##############################################################################
-#
-# Copyright (c) 2002 Zope Corporation and Contributors. All Rights Reserved.
-#
-# This software is subject to the provisions of the Zope Public License,
-# Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.
-# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
-# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
-# FOR A PARTICULAR PURPOSE
-#
-##############################################################################
-"""Old Zope-specific Python Expression Handler
-
-Handler for Python expressions, using the pre-Python 2.1 restriction
-machinery from PythonScripts.
-
-$Id$
-"""
-from AccessControl import getSecurityManager
-from Products.PythonScripts.Guarded import _marker, \
-     GuardedBlock, theGuard, safebin, WriteGuard, ReadGuard, UntupleFunction
-from TALES import CompilerError
-
-from PythonExpr import PythonExpr
-
-class PythonExpr(PythonExpr):
-    def __init__(self, name, expr, engine):
-        self.expr = expr = expr.strip().replace('\n', ' ')
-        blk = GuardedBlock('def f():\n return \\\n %s\n' % expr)
-        if blk.errors:
-            raise CompilerError, ('Python expression error:\n%s' %
-                                  '\n'.join(blk.errors) )
-        guards = {'$guard': theGuard, '$write_guard': WriteGuard,
-                  '$read_guard': ReadGuard, '__debug__': __debug__}
-        self._f = UntupleFunction(blk.t, guards, __builtins__=safebin)
-        self._get_used_names()
-
-class _SecureModuleImporter:
-    __allow_access_to_unprotected_subobjects__ = 1
-    def __getitem__(self, module):
-        mod = safebin['__import__'](module)
-        path = module.split('.')
-        for name in path[1:]:
-            mod = getattr(mod, name)
-        return mod
-
-from DocumentTemplate.DT_Util import TemplateDict, InstanceDict
-def validate(accessed, container, name, value, dummy):
-    return getSecurityManager().validate(accessed, container, name, value)
-def call_with_ns(f, ns, arg=1):
-    td = TemplateDict()
-    td.validate = validate
-    td.this = ns['here']
-    td._push(ns['request'])
-    td._push(InstanceDict(td.this, td))
-    td._push(ns)
-    try:
-        if arg==2:
-            return f(None, td)
-        else:
-            return f(td)
-    finally:
-        td._pop(3)