human
Solve the following python programming problem given the following code:
def positions(keyword = '', serps = '', topkeyword = '') : 
    'Return a position/url paired JSON dict of all results for keyword.' 
    if topkeyword : 
        keyword = topkeyword 
if (not serps) : 
        def gserps(keyword) : 
            global serps 
            return serps (keyword) 
serps = gserps (rd) 
else : 
        if serps : 
            serps = json.loads (serps) 
            easydict = { 
                
} 
            serpos = 1 
            rd = serps [0] ['responseData'] 
            if (rd == None) : 
                return 'API quota likely exceeded' 
for serpage in serps : 
                try : 
                    serpage = serpage ['responseData'] ['results'] 
                    for result in serpage : 
                        easydict [serpos] = result ['url'] 
                        serpos += 1 
except : 
                    pass 
return json.dumps (easydict) 
else : 
            return 'Error' 

    
    

    Fix the buggy line: serps = gserps (rd)
assistant
#Here is Python program to fix the buggy line: serps = gserps (rd)
.

serps = gserps (keyword)