human
Solve the following python programming problem given the following code:
def rehashdir_f(self, arg) : 
    ' Add executables in all specified dirs to alias table
     
    Usage:

    %rehashdir c:/bin;c:/tools
      - Add all executables under c:/bin and c:/tools to alias table, in 
      order to make them directly executable from any directory.
        
      Without arguments, add all executables in current directory.
      
    ' 
    def isjunk(fname) : 
        junk = ['*~'] 
        for j in junk : 
            if fnmatch.fnmatch (fname, j) : 
                return True 
return False 
created = [] 
    if (not arg) : 
        arg = '.' 
path = list (map (os.path.abspath, arg.split (';'))) 
    alias_table = self.shell.alias_manager.alias_table 
    if (os.name == 'posix') : 
        isexec = (lambda fname : (os.path.isfile (fname) and os.access (fname, os.X_OK))) 
else : 
        try : 
            winext = os.environ ['pathext'].replace (';', '|').replace ('.', '') 
except KeyError : 
            winext = 'exe|com|bat|py' 
if ('py' not in winext) : 
            winext += '|py' 
execre = re.compile (('(.*)\\.(%s)$' % winext), re.IGNORECASE) 
        isexec = (lambda fname : (os.path.isfile (fname) and execre.match (fname))) 
savedir = os.getcwd () 
    try : 
        if (os.name == 'posix') : 
            for pdir in path : 
                os.chdir (pdir) 
                for ff in os.listdir (pdir) : 
                    if (isexec (ff) and (not isjunk (ff))) : 
                        (src, tgt) = (os.path.splitext (savedir) [0], os.path.abspath (ff)) 
                        created.append (src) 
                        alias_table [src] = (0, tgt) 
else : 
            for pdir in path : 
                os.chdir (pdir) 
                for ff in os.listdir (pdir) : 
                    if (isexec (ff) and (not isjunk (ff))) : 
                        (src, tgt) = (execre.sub ('\\1', ff), os.path.abspath (ff)) 
                        src = src.lower () 
                        created.append (src) 
                        alias_table [src] = (0, tgt)...

    
    

    Fix the buggy line: (src, tgt) = (os.path.splitext (savedir) [0], os.path.abspath (ff))
assistant
#Here is Python program to fix the buggy line: (src, tgt) = (os.

(src, tgt) = (os.path.splitext (ff) [0], os.path.abspath (ff))