Passing a variable number of arguments to a wrapped function.

[stephen]

Is there a better way of doing this so that I don't have to go through
every permutation of possible arguments (the example here from the
matplotlib 'plot' function):

def makeplot(self, xvalues, yvalues, linecolor='', linewidth=''):
if linecolor and linewidth:
plot(xvalues, yvalues, linecolor, linewidth=linew idth)
elif linecolor:
plot(xvalues, yvalues, linecolor)
elif linewidth:
plot(xvalues, yvalues, linewidth=linew idth)
else:
plot(xvalues, yvalues)

Stephen

[Robert Kern]

st*****@theboul ets.net wrote:

Is there a better way of doing this so that I don't have to go through
every permutation of possible arguments (the example here from the
matplotlib 'plot' function):

Usually, you would just make the defaults for linecolor and linewidth
the same as the defaults for the underlying function. matplotlib.pyla b
functions, however, have too much intelligence coded in them for this to
be easy.

--
Robert Kern
rk***@ucsd.edu

"In the fields of hell where the grass grows high
Are the graves of dreams allowed to die."
-- Richard Harter

On 5 Aug 2005 08:34:32 -0700
st*****@theboul ets.net wrote:

Is there a better way of doing this so that I don't have to go through
every permutation of possible arguments (the example here from the
matplotlib 'plot' function):

def makeplot(self, xvalues, yvalues, linecolor='', linewidth=''):
if linecolor and linewidth:
plot(xvalues, yvalues, linecolor, linewidth=linew idth)
elif linecolor:
plot(xvalues, yvalues, linecolor)
elif linewidth:
plot(xvalues, yvalues, linewidth=linew idth)
else:
plot(xvalues, yvalues)

What's wrong with:

def makeplot(self, xvalues, yvalues, **kwargs):
plot(xvalues, yvalues, **kwargs)

or even:

def makeplot(self, *a, **ka):
plot(*a, **ka)

?

--
jk

[John Hunter]

>>>>> "stephen" == stephen <st*****@thebou lets.net> writes:

stephen> Is there a better way of doing this so that I don't have
stephen> to go through every permutation of possible arguments
stephen> (the example here from the matplotlib 'plot' function):

You can make linecolor=None and linewidth=None, and then use
matplotlib's rc defaults

from matplotlib import rcParams
def makeplot(self, xvalues, yvalues, linecolor=None, linewidth=None) :
if linecolor is None: linecolor = rcParams['lines.color']
if linewidth is None: linewidth = rcParams['lines.linewidt h']
plot(xvalues, yvalues, color=linecolor , linewidth=linew idth)

Then you can customize the defaults in the rc file
(http://matplotlib.sf.net/matplotlibrc) any way you want.

Alternatively, you can also set the defaults in your script

from matplotlib import rc
rc('lines', linewidth=1.0, color='red')

JDH

[Bengt Richter]

On 5 Aug 2005 08:34:32 -0700, st*****@theboul ets.net wrote:

Is there a better way of doing this so that I don't have to go through
every permutation of possible arguments (the example here from the
matplotlib 'plot' function):

def makeplot(self, xvalues, yvalues, linecolor='', linewidth=''):
if linecolor and linewidth:
plot(xvalues, yvalues, linecolor, linewidth=linew idth)
elif linecolor:
plot(xvalues, yvalues, linecolor)
elif linewidth:
plot(xvalues, yvalues, linewidth=linew idth)
else:
plot(xvalues, yvalues)

It seems like you are not changing the order or values of arguments,
so I'm wondering if this would work for you:

def makeplot(self, *args, **kwargs):
plot(*args, **kwargs)

and if not, why not.

Regards,
Bengt Richter

[stephen]

Using 'plot(*args, **kwargs)' does seem to work just fine.

Thanks to all for their suggestions.

Stephen