human
Solve the following python programming problem given the following code:
def CtrlPPyMatch() : 
    items = vim.eval ('a:items') 
    astr = vim.eval ('a:str') 
    lowAstr = astr.lower () 
    limit = int (vim.eval ('a:limit')) 
    mmode = vim.eval ('a:mmode') 
    aregex = int (vim.eval ('a:regex')) 
    rez = vim.eval ('s:rez') 
    specialChars = ['^', '$', '.', '{', '}', '(', ')', '[', ']', '\\', '/', '+'] 
    regex = '' 
    if (aregex == 1) : 
        regex = astr 
else : 
        if (len (lowAstr) == 1) : 
            c = lowAstr 
            if (c in specialChars) : 
                c = ('\\' + c) 
regex += c 
else : 
            for c in lowAstr [: (- 1)] : 
                if (c in specialChars) : 
                    c = ('\\' + c) 
regex += (((c + '[^') + c) + ']*') 
else : 
                c = lowAstr [(- 1)] 
                if (c in specialChars) : 
                    c = ('\\' + c) 
regex += c 
res = [] 
    prog = re.compile (regex) 
    def filename_score(line) : 
        slashPos = line.rfind ('/') 
        if (slashPos != (- 1)) : 
            line = line [(slashPos + 1) :] 
lineLower = line.lower () 
        result = prog.search (lineLower) 
        if result : 
            score = ((result.end () - result.start ()) + 1) 
            score = (score + ((len (lineLower) + 1) / 100.0)) 
            score = (score + ((len (line) + 1) / 1000.0)) 
            return (1000.0 / score) 
return 0 
def path_score(line) : 
        lineLower = line.lower () 
        result = prog.search (lineLower) 
        if result : 
            score = ((result.end () - result.start ()) + 1) 
            score = (score + ((len (lineLower) + 1) / 100.0)) 
            return (1000.0 / score) 
return 0 
if (mmode == 'filename-only') : 
        res = [(filename_score (line), aregex) for line in items] 
else : 
        if (mmode == 'first-non-tab') : 
            res = [(path_score (line.split ('\t') [0]), line) for line in items] 
else : 
            if (mmode == 'until-last-tab') : 
                res = [(path_score (line.rsplit ('\t') [0]), line) for line in items] 
else : 
        ...

    
    

    Fix the buggy line: res = [(filename_score (line), aregex) for line in items]
assistant
#Here is Python program to find ('/') 
.

res = [(filename_score (line), line) for line in items]