ImportError: cannot import name ISearchSource

[Markus Tacker <m@…>]

This happens whith
trac-admin upgrade
and display trac in the browser.

Traceback (most recent call last):
  File "/usr/lib/python2.3/site-packages/mod_python/apache.py", line 299, in HandlerDispatch
      result = object(req)
  File "/usr/lib/python2.3/site-packages/trac/web/modpython_frontend.py", line 196, in handler
      env = get_environment(mpr, project_opts)
  File "/usr/lib/python2.3/site-packages/trac/web/main.py", line 600, in get_environment
      return _open_environment(env_path, threaded)
  File "/usr/lib/python2.3/site-packages/trac/web/main.py", line 54, in _open_environment
      env_cache[env_path] = open_environment(env_path)
  File "/usr/lib/python2.3/site-packages/trac/env.py", line 362, in open_environment
      env = Environment(env_path)
  File "/usr/lib/python2.3/site-packages/trac/env.py", line 91, in __init__
      load_components(self)
  File "/usr/lib/python2.3/site-packages/trac/loader.py", line 49, in load_components
      load_component(module)
  File "/usr/lib/python2.3/site-packages/trac/loader.py", line 68, in load_component
      module = _load_module(head, module_name, module, path)
  File "/usr/lib/python2.3/site-packages/trac/loader.py", line 82, in _load_module
      module = imp.load_module(name, fd, path, desc)
  File "/usr/lib/python2.3/site-packages/trac/Changeset.py", line 36, in ?
      from trac.Search import ISearchSource, query_to_sql, shorten_result
ImportError: cannot import name ISearchSource

[Markus Tacker <m@…>]

This alos happens with trac-admin initenv

Creating and Initializing Project
Failed to create environment. cannot import name ISearchSource
Traceback (most recent call last):
  File "/usr/lib/python2.3/site-packages/trac/scripts/admin.py", line 108, in env_create
    self.__env = Environment(self.envname, create=True, db_str=db_str)
  File "/usr/lib/python2.3/site-packages/trac/env.py", line 91, in __init__
    load_components(self)
  File "/usr/lib/python2.3/site-packages/trac/loader.py", line 49, in load_components
    load_component(module)
  File "/usr/lib/python2.3/site-packages/trac/loader.py", line 68, in load_component
    module = _load_module(head, module_name, module, path)
  File "/usr/lib/python2.3/site-packages/trac/loader.py", line 82, in _load_module
    module = imp.load_module(name, fd, path, desc)
  File "/usr/lib/python2.3/site-packages/trac/Changeset.py", line 36, in ?
    from trac.Search import ISearchSource, query_to_sql, shorten_result
ImportError: cannot import name ISearchSource
Failed to initialize environment. 1
Traceback (most recent call last):
  File "/usr/lib/python2.3/site-packages/trac/scripts/admin.py", line 562, in do_initenv
    self.env_create(db_str)
  File "/usr/lib/python2.3/site-packages/trac/scripts/admin.py", line 114, in env_create
    sys.exit(1)
SystemExit: 1

[Markus Tacker <m@…>]

Closed.
Resolved by removing /usr/lib/python2.3/site-packages/trac/ prior to upgrading.