mosscliffe schreef:
> for x,y in map("N/A", lista, listb): ########## Fails - Can not call a
> 'str'
> print "MAP:", x, "<<x y>>", y
>
> def fillwith(fillchars):
> return fillchars
>
> for x,y in map(fillwith("N/A"), lista, listb): ########## Fails also -
> Can not call a 'str'
> print "MAP:", x, "<<x y>>", y
The first argument to map is a function, which is called with the items
of the argument sequences. If the first argument is None, a default
function is used which returns a tuple of the items. In the case that
two input sequences are provided:
map(None, lista, listb)
is equivalent to:
def maketuple(a, b):
return a, b
map(maketuple, lista, listb)
So what you want to do can be done with map like this:
def make_fill_missing(fillchars):
def fill_missing(a, b):
if a is None:
a = fillchars
if b is None:
b = fillchars
return a, b
return fill_missing
map(make_fill_missing("N/A"), lista, listb))
--
If I have been able to see further, it was only because I stood
on the shoulders of giants. -- Isaac Newton
Roel Schroeven
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