pdb.py 文件源码

def set_trace(frame=None, Pdb=Pdb, **kwds):
    global GLOBAL_PDB

    if frame is None:
        frame = sys._getframe().f_back

    if GLOBAL_PDB:
        pdb = GLOBAL_PDB
    else:
        filename = frame.f_code.co_filename
        lineno = frame.f_lineno
        pdb = Pdb(start_lineno=lineno, start_filename=filename, **kwds)
        GLOBAL_PDB = pdb

    if hasattr(pdb, 'curframe'):
        del pdb.curframe

    pdb.set_trace(frame)