FreeCAD

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try:
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    import FreeCAD as app
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except ModuleNotFoundError:
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    # sys.path modification has not happened yet
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    import sys as _sys
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    import os as _os
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    # 1. we check if an env-variable "PATH_TO_FREECAD_LIB" is already set
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    try:
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        _path_to_freecad_libdir = _os.environ["PATH_TO_FREECAD_LIBDIR"]
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    except KeyError:
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        # 2. we use the default freecad defined for this package
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        _path_to_freecad_libdir = "${FREECAD_LIBRARY_INSTALL_DIR}"
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        print("PATH_TO_FREECAD_LIBDIR not specified, using default \
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FreeCAD version in {}".format("${FREECAD_LIBRARY_INSTALL_DIR}"))
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    _sys.path.append(_path_to_freecad_libdir) # this is the default version
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    import FreeCAD as app
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# as this is a namespace-package we need to extend the path
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#!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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# TO NOT OVERWRITE THIS FILE, NO OTHER MODULE IS ALLOWED TO      !
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# PROVIDE A freecad/__init__.py FILE                             !
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#!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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from pkgutil import extend_path as _extend_path
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__path__ = _extend_path(__path__, __name__)
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