Function _main

Lib/inspect.py:3356–3411

Logic for inspecting an object given at command line

()

def _main():
    """ Logic for inspecting an object given at command line """
    import argparse
    import importlib

    parser = argparse.ArgumentParser(color=True)
    parser.add_argument(
        'object',
         help="The object to be analysed. "
              "It supports the 'module:qualname' syntax")
    parser.add_argument(
        '-d', '--details', action='store_true',
        help='Display info about the module rather than its source code')

    args = parser.parse_args()

    target = args.object
    mod_name, has_attrs, attrs = target.partition(":")
    try:
        obj = module = importlib.import_module(mod_name)
    except Exception as exc:
        msg = "Failed to import {} ({}: {})".format(mod_name,
                                                    type(exc).__name__,
                                                    exc)
        print(msg, file=sys.stderr)
        sys.exit(2)

    if has_attrs:
        parts = attrs.split(".")
        obj = module
        for part in parts:
            obj = getattr(obj, part)

    if module.__name__ in sys.builtin_module_names:
        print("Can't get info for builtin modules.", file=sys.stderr)
        sys.exit(1)

    if args.details:
        print(f'Target: {target}')
        print(f'Origin: {getsourcefile(module)}')
        print(f'Cached: {module.__spec__.cached}')
        if obj is module:
            print(f'Loader: {module.__loader__!r}')
            if hasattr(module, '__path__'):
                print(f'Submodule search path: {module.__path__}')
        else:
            try:
                __, lineno = findsource(obj)
            except Exception:
                pass
            else:
                print(f'Line: {lineno}')

        print()
    else:
        print(getsource(obj))