Source code for kqcircuits.pya_resolver

# This code is part of KQCircuits
# Copyright (C) 2021 IQM Finland Oy
# This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public
# License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later
# version.
# This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
# You should have received a copy of the GNU General Public License along with this program. If not, see
# The software distribution should follow IQM trademark policy for open-source software
# ( IQM welcomes contributions to the code. Please see our contribution agreements
# for individuals ( and organizations (

"""This module is used for importing the KLayout Python API (pya).

Without this module, the API would need to be imported using ``import pya`` for usage in KLayout Editor and using
``import klayout.db`` for usage with standalone klayout package. To make it simple to create a python module for both
use cases, this module automatically imports the correct module and exposes it as ``pya``.

It also contains convenience functions to find the KLayout executable and the running session type.

    from kqcircuits.pya_resolver import pya


import os
import platform
from pathlib import Path
from shutil import which
    import pya
    import pya as lay  # pylint: disable=unused-import
except ImportError:
    import klayout.db as pya
    from klayout import lay  # pylint: disable=unused-import

[docs]def is_standalone_session(): return not hasattr(pya, 'Application')
[docs]def klayout_executable_command(): """Returns the KLayout executable command's full path in the current OS. Or ``None`` if it is not found.""" if is_standalone_session(): if platform.system() == "Windows": klayout_path = which("klayout_app.exe") if klayout_path is None: # try the default location dwp = Path(os.getenv("APPDATA")).joinpath("KLayout/klayout_app.exe") if dwp.is_file(): return str(dwp) return klayout_path klayout_path = which("klayout") # Linux is simple :) if klayout_path is None and platform.system() == "Darwin": dwp = "/Applications/" if Path(dwp).is_file(): return dwp dwp = "/Applications/KLayout/" if Path(dwp).is_file(): return dwp return klayout_path else: # The path of the currently running KLayout application return pya.Application.instance().applicationFilePath()