Function get_scanner

uncompyle6/scanner.py:608–661

Import the right scanner module for ``version`` and return the Scanner class in that module.

(version: Union[str, tuple], is_pypy=False, show_asm=None)

def get_scanner(version: Union[str, tuple], is_pypy=False, show_asm=None) -> Scanner:
    """
    Import the right scanner module for ``version`` and return the Scanner class
    in that module.
    """
    # If version is a string, turn that into the corresponding float.
    if isinstance(version, str):
        if version not in canonic_python_version:
            raise RuntimeError(f"Unknown Python version in xdis {version}")
        canonic_version = canonic_python_version[version]
        if canonic_version not in CANONIC2VERSION:
            raise RuntimeError(
                f"Unsupported Python version {version} (canonic {canonic_version})"
            )
        version = CANONIC2VERSION[canonic_version]

    # Pick up appropriate scanner
    if version[:2] in PYTHON_VERSIONS:
        v_str = version_tuple_to_str(version, start=0, end=2, delimiter="")
        try:
            import importlib

            if is_pypy:
                scan = importlib.import_module("uncompyle6.scanners.pypy%s" % v_str)
            else:
                scan = importlib.import_module("uncompyle6.scanners.scanner%s" % v_str)
            if False:
                print(scan)  # Avoid unused scan
        except ImportError:
            if is_pypy:
                exec(
                    "import uncompyle6.scanners.pypy%s as scan" % v_str,
                    locals(),
                    globals(),
                )
            else:
                exec(
                    "import uncompyle6.scanners.scanner%s as scan" % v_str,
                    locals(),
                    globals(),
                )
        if is_pypy:
            scanner = eval(
                "scan.ScannerPyPy%s(show_asm=show_asm)" % v_str, locals(), globals()
            )
        else:
            scanner = eval(
                "scan.Scanner%s(show_asm=show_asm)" % v_str, locals(), globals()
            )
    else:
        raise RuntimeError(
            f"Unsupported Python version, {version_tuple_to_str(version)}, for decompilation"
        )
    return scanner


if __name__ == "__main__":