code.delx.au - offlineimap/blob - offlineimap/localeval.py

   1 """Eval python code with global namespace of a python source file."""
   2
   3 # Copyright (C) 2002 John Goerzen
   4 # <jgoerzen@complete.org>
   5 #
   6 #    This program is free software; you can redistribute it and/or modify
   7 #    it under the terms of the GNU General Public License as published by
   8 #    the Free Software Foundation; either version 2 of the License, or
   9 #    (at your option) any later version.
  10 #
  11 #    This program is distributed in the hope that it will be useful,
  12 #    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 #    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 #    GNU General Public License for more details.
  15 #
  16 #    You should have received a copy of the GNU General Public License
  17 #    along with this program; if not, write to the Free Software
  18 #    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  19
  20 import imp
  21 try:
  22     import errno
  23 except:
  24     pass
  25
  26 class LocalEval:
  27     def __init__(self, path=None):
  28         self.namespace={}
  29
  30         if path is not None:
  31             file=open(path, 'r')
  32             module=imp.load_module(
  33                 '<none>',
  34                 file,
  35                 path,
  36                 ('', 'r', imp.PY_SOURCE))
  37             for attr in dir(module):
  38                 self.namespace[attr]=getattr(module, attr)
  39
  40     def eval(self, text, namespace=None):
  41         names = {}
  42         names.update(self.namespace)
  43         if namespace is not None:
  44             names.update(namespace)
  45         return eval(text, names)