i have this url : 
http://127.0.0.1:8000/PROVE/dettaglio_aggiornamenti/SPE/SPE_2016011518051300.csv
 
generated by:
href="{{=URL(r=request,f='dettaglio_aggiornamenti',args=['SPE',ultimoFileSpe])}}
i believed that 
request.args[0] == 'SPE'
and 
request.args[1]== 'SPE_2016011518051300.csv'

but i got :
"""
<type 'exceptions.IndexError'> list index out of range


Function argument list 

()
Code listing 

1520.
1521.
1522.
1523.
1524.
1525.

1526.
1527.
1528.
1529.

    records=legacy_db(legacy_db.SFIMDB.filename==ufile).select()
 return dict(records=records)


def dettaglio_aggiornamenti():
 tab = request.args[0]

 b=request.args[1]



Variables global request <Storage {'_vars': None, 'function': 
'dettaglio_...marcello/CODE/MIEI/WEB2.10/applications/PROVE/'}> request.args 
[] tab undefined


"""

Why request.args turns to be undefined

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