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# SPDX-FileCopyrightText: All Contributors to the PyTango project
# SPDX-License-Identifier: LGPL-3.0-or-later
"""Provides PyTango as a module for backward compatibility."""
# Imports
import sys
import tango
import pkgutil
def alias_package(package, alias, extra_modules={}):
"""Alias a python package properly.
It ensures that modules are not duplicated by trying
to import and alias all the submodules recursively.
"""
path = package.__path__
alias_prefix = alias + "."
prefix = package.__name__ + "."
# Alias all importable modules recursively
for _, name, _ in pkgutil.walk_packages(path, prefix):
# Skip databaseds backends
if name.startswith("tango.databaseds.db_access."):
continue
try:
if name not in sys.modules:
__import__(name)
except ImportError:
continue
alias_name = name.replace(prefix, alias_prefix)
sys.modules[alias_name] = sys.modules[name]
# Alias extra modules
for key, value in extra_modules.items():
name = prefix + value
if name not in sys.modules:
__import__(name)
if not hasattr(package, key):
setattr(package, key, sys.modules[name])
sys.modules[alias_prefix + key] = sys.modules[name]
# Alias root module
sys.modules[alias] = sys.modules[package.__name__]
# Do not flood pytango users console with warnings yet
# warnings.warn('PyTango module is deprecated, import tango instead.')
# Alias tango package
alias_package(
package=tango,
alias=__name__,
extra_modules={"_PyTango": "_tango", "constants": "constants"},
)
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