| Server IP : 84.32.84.121 / Your IP : 216.73.216.254 Web Server : LiteSpeed System : Linux id-dci-web1986.main-hosting.eu 5.14.0-611.26.1.el9_7.x86_64 #1 SMP PREEMPT_DYNAMIC Thu Jan 29 05:24:47 EST 2026 x86_64 User : u686484674 ( 686484674) PHP Version : 8.0.30 Disable Function : system, exec, shell_exec, passthru, mysql_list_dbs, ini_alter, dl, symlink, link, chgrp, leak, popen, apache_child_terminate, virtual, mb_send_mail MySQL : OFF | cURL : ON | WGET : ON | Perl : OFF | Python : OFF | Sudo : OFF | Pkexec : OFF Directory : /proc/self/root/opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/util/ |
Upload File : |
# util/_preloaded.py
# Copyright (C) 2005-2024 the SQLAlchemy authors and contributors
# <see AUTHORS file>
#
# This module is part of SQLAlchemy and is released under
# the MIT License: https://www.opensource.org/licenses/mit-license.php
"""supplies the "preloaded" registry to resolve circular module imports at
runtime.
"""
import sys
from . import compat
class _ModuleRegistry:
"""Registry of modules to load in a package init file.
To avoid potential thread safety issues for imports that are deferred
in a function, like https://bugs.python.org/issue38884, these modules
are added to the system module cache by importing them after the packages
has finished initialization.
A global instance is provided under the name :attr:`.preloaded`. Use
the function :func:`.preload_module` to register modules to load and
:meth:`.import_prefix` to load all the modules that start with the
given path.
While the modules are loaded in the global module cache, it's advisable
to access them using :attr:`.preloaded` to ensure that it was actually
registered. Each registered module is added to the instance ``__dict__``
in the form `<package>_<module>`, omitting ``sqlalchemy`` from the package
name. Example: ``sqlalchemy.sql.util`` becomes ``preloaded.sql_util``.
"""
def __init__(self, prefix="sqlalchemy."):
self.module_registry = set()
self.prefix = prefix
def preload_module(self, *deps):
"""Adds the specified modules to the list to load.
This method can be used both as a normal function and as a decorator.
No change is performed to the decorated object.
"""
self.module_registry.update(deps)
return lambda fn: fn
def import_prefix(self, path):
"""Resolve all the modules in the registry that start with the
specified path.
"""
for module in self.module_registry:
if self.prefix:
key = module.split(self.prefix)[-1].replace(".", "_")
else:
key = module
if (
not path or module.startswith(path)
) and key not in self.__dict__:
compat.import_(module, globals(), locals())
self.__dict__[key] = sys.modules[module]
preloaded = _ModuleRegistry()
preload_module = preloaded.preload_module