pdb.py 文件源码

def import_from_stdlib(name):
    import code  # arbitrary module which stays in the same dir as pdb
    result = types.ModuleType(name)
    imported = False

    if hasattr(code, '__loader__'):
        try:
            code = code.__loader__.get_code('pdb')
        except ImportError:
            pass
        else:
            resultd = {}
            exec(code, resultd)
            for k, v in resultd.items():
              setattr(result, k, v)
            imported = True

    if not imported:
        stdlibdir, _ = os.path.split(code.__file__)
        pyfile = os.path.join(stdlibdir, name + '.py')
        with open(pyfile) as f:
            src = f.read()
        co_module = compile(src, pyfile, 'exec', dont_inherit=True)
        exec(co_module, result.__dict__)

    return result