misc.py 文件源码

def execfile(filename, myglobals=None, mylocals=None):
        """
        Read and execute a Python script from a file in the given namespaces.
        The globals and locals are dictionaries, defaulting to the current
        globals and locals. If only globals is given, locals defaults to it.
        """
        if myglobals is None:
            # There seems to be no alternative to frame hacking here.
            caller_frame = inspect.stack()[1]
            myglobals = caller_frame[0].f_globals
            mylocals = caller_frame[0].f_locals
        elif mylocals is None:
            # Only if myglobals is given do we set mylocals to it.
            mylocals = myglobals
        if not isinstance(myglobals, Mapping):
            raise TypeError('globals must be a mapping')
        if not isinstance(mylocals, Mapping):
            raise TypeError('locals must be a mapping')
        with open(filename, "rbU") as fin:
             source = fin.read()
        code = compile(source, filename, "exec")
        exec_(code, myglobals, mylocals)