Roberto Bonvallet wrote: > imho <certo at comeno.it>: >> map(lambda x:"" , [i for i in [a,b,c] if i in ("None",None) ]) > You don't need map when using list comprehensions: > ["" for i in [a, b, c] if i in ("None", None)] > More like: [(i, "")[i in ("None", None)] for i in [a,b,c]] -- --Scott David Daniels scott.daniels at acm.org