# Runtime hook: load this CPython's Tcl/Tk before Graphviz's tcl86t.dll (8.6.10)
# can shadow them. PyInstaller then points TCL_LIBRARY at bundled _tcl_data (8.6.12).
def _pyi_rthook():
    import os
    import sys

    if not getattr(sys, "frozen", False):
        return
    base = getattr(sys, "_MEIPASS", None) or os.path.dirname(sys.executable)
    os.environ["PATH"] = base + os.pathsep + os.environ.get("PATH", "")
    try:
        os.add_dll_directory(base)
    except (AttributeError, OSError):
        pass
    tcldir = os.path.join(base, "_tcl_data")
    tkdir = os.path.join(base, "_tk_data")
    if os.path.isdir(tcldir):
        os.environ["TCL_LIBRARY"] = tcldir
    if os.path.isdir(tkdir):
        os.environ["TK_LIBRARY"] = tkdir
    try:
        import ctypes

        for name in ("tcl86t.dll", "tk86t.dll"):
            path = os.path.join(base, name)
            if os.path.isfile(path):
                ctypes.WinDLL(path)
    except Exception:
        pass


_pyi_rthook()
del _pyi_rthook