When passing functions as args,how to pass extra args for passed function?

[python]

When I pass a function as an arg, like for map(...), how do I pass args to
use for that function?

If I have a function like this:

def pretty_format(f , fmt='%0.3f'):
return fmt % f

I want to use it with map() like this:

formatted = map(pretty_form at, unformatted_lis t)
#exept I want fmt='%4.5f' !!!

I need to figure out how to pass a non-default value for fmt. How do I do
that?

[Christos TZOTZIOY Georgiou]

On Tue, 16 Sep 2003 17:08:53 -0400 (EDT), rumours say that
py****@sarcasti c-horse.com might have written:

When I pass a function as an arg, like for map(...), how do I pass args to
use for that function?

If I have a function like this:

def pretty_format(f , fmt='%0.3f'):
return fmt % f

I want to use it with map() like this:

formatted = map(pretty_form at, unformatted_lis t)
#exept I want fmt='%4.5f' !!!

I need to figure out how to pass a non-default value for fmt. How do I do
that?

I believe this is what you want:

formatted = map(pretty_form at, unformatted_lis t,
['%4.5f'] * len(unformatted _list))
--
TZOTZIOY, I speak England very best,
Microsoft Security Alert: the Matrix began as open source.

[Sean Ross]

<py****@sarcast ic-horse.com> wrote in message
news:ma******** *************** **********@pyth on.org...

When I pass a function as an arg, like for map(...), how do I pass args to
use for that function?

If I have a function like this:

def pretty_format(f , fmt='%0.3f'):
return fmt % f

I want to use it with map() like this:

formatted = map(pretty_form at, unformatted_lis t)
#exept I want fmt='%4.5f' !!!

I need to figure out how to pass a non-default value for fmt. How do I do
that?

Here's one way:

formatted = map(lambda f: pretty_format(f , fmt='%4.5f'), unformatted_lis t)
And, here's another (requires itertools, available in Python 2.3[*]):

from itertools import repeat
formatted = map(pretty_form at, unformated_list , repeat('%4.5f') )

[*]
# or you can roll your own,
# credit: http://www.python.org/dev/doc/devel/...functions.html
def repeat(object, times=None):
if times is None:
while True:
yield object
else:
for i in xrange(times):
yield object

# may need 'from __future__ import generators' at top of file

HTH
Sean

[David Eppstein]

In article <XQ************ *******@news20. bellglobal.com> ,
"Sean Ross" <sr***@connectm ail.carleton.ca > wrote:

Here's one way:

formatted = map(lambda f: pretty_format(f , fmt='%4.5f'), unformatted_lis t)
And, here's another (requires itertools, available in Python 2.3[*]):

from itertools import repeat
formatted = map(pretty_form at, unformated_list , repeat('%4.5f') )
[*]
# or you can roll your own,
# credit: http://www.python.org/dev/doc/devel/...functions.html
def repeat(object, times=None):
if times is None:
while True:
yield object
else:
for i in xrange(times):
yield object

# may need 'from __future__ import generators' at top of file

def curry(f, **kwargs):
return lambda *largs: f(*largs,**kwar gs)

map(curry(prett y_format, fmt='%4.5f'), unformatted_lis t)

--
David Eppstein http://www.ics.uci.edu/~eppstein/
Univ. of California, Irvine, School of Information & Computer Science