Hi,
I've a problem with the draw function.
I've tried to execute the python code available at the web-page
https://networkx.lanl.gov/wiki/file/networkx/trunk/doc/examples/draw_colors.py
It uses matplotlib + networkx.
By executing this code, I receive the following error message:
File "draw_colors.py", line 27, in ?
draw(G,pos,node_color=array([G.degree(v) for v in G]))
TypeError: draw() takes exactly 1 non-keyword argument (2 given)
By executing similar codes, I receive similar message.
It seems I have a problem with the draw function.
Can you help me to understand why I have this problem and how is it
possible to solve it?
I suppose it's related to the use of matplotlib more then to the use of
networkx.
Many thanks.
All the best,
Nic
(first reply mistakenly went only to Giandomenico)
Hi,
I have a guess. I didn't download NetworkX to give it a try, but both
pylab and networkx have draw() functions, and the example just does a
"from blah import *" for both. At a guess, the pylab draw() function
is clobbering the intended NetworkX draw() function. Try this:
try:
import pylab # DON'T DO: from pylab import *
except:
print "pylab not found: see https://networkx.lanl.gov/Drawing.html for info"
raise
from networkx import *
G=grid_2d_graph(4,4) #4x4 grid
pos=spring_layout(G)
draw(G,pos,alpha=0.5,with_labels=False)
draw(G,pos,nodelist=[1,2,3,4],node_color='b') # blue
pylab.savefig("grid.png") # save as png
pylab.show() # display
···
File "draw_colors.py", line 27, in ?
draw(G,pos,node_color=array([G.degree(v) for v in G]))
TypeError: draw() takes exactly 1 non-keyword argument (2 given)
--
Charles R. Twardy
Patient: doctor, it hurts when I do this.
Doctor: Then don't do that!
Charles R. Twardy wrote:
try:
import pylab # DON'T DO: from pylab import *
...
from networkx import *
And don't do that either!
Namespaces are one honking great idea: let's do more of those!
-Chris
···
--
Christopher Barker, Ph.D.
Oceanographer
NOAA/OR&R/HAZMAT (206) 526-6959 voice
7600 Sand Point Way NE (206) 526-6329 fax
Seattle, WA 98115 (206) 526-6317 main reception
Chris.Barker@...259...
Hi,
Many thanks.
I tried to use this new code, but nothing to do.
The error remains the same.
DO you have other suggestions please?
Thanks.
Nico
···
Il giorno mar, 10/01/2006 alle 14.20 -0500, Charles R. Twardy ha scritto:
(first reply mistakenly went only to Giandomenico)
Hi,
I have a guess. I didn't download NetworkX to give it a try, but both
pylab and networkx have draw() functions, and the example just does a
"from blah import *" for both. At a guess, the pylab draw() function
is clobbering the intended NetworkX draw() function. Try this:
try:
import pylab # DON'T DO: from pylab import *
except:
print "pylab not found: see https://networkx.lanl.gov/Drawing.html for info"
raise
from networkx import *
G=grid_2d_graph(4,4) #4x4 grid
pos=spring_layout(G)
draw(G,pos,alpha=0.5,with_labels=False)
draw(G,pos,nodelist=[1,2,3,4],node_color='b') # blue
pylab.savefig("grid.png") # save as png
pylab.show() # display
> File "draw_colors.py", line 27, in ?
> draw(G,pos,node_color=array([G.degree(v) for v in G]))
> TypeError: draw() takes exactly 1 non-keyword argument (2 given)
--
Charles R. Twardy
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Nic,
I downloaded NetworkX from sourceforge and unpacked it. Then:
cd networkx-0.26
python setup.py build && sudo python setup.py install
cd doc/examples
python draw_colors.py
It ran fine.
I changed the code to avoid all the "import *". Try this?
#!/usr/bin/env python
"""
Draw a graph with matplotlib.
You must have matplotlib for this to work.
"""
__author__ = """Aric Hagberg (hagberg@...652...)"""
__date__ = "$Date: 2005-03-22 13:57:46 -0700 (Tue, 22 Mar 2005) $"
__credits__ = """"""
__revision__ = "$Revision: 831 $"
# Copyright (C) 2004 by
# Aric Hagberg <hagberg@...652...>
# Dan Schult <dschult@...945...>
# Pieter Swart <swart@...652...>
# Distributed under the terms of the GNU Lesser General Public License
# http://www.gnu.org/copyleft/lesser.html
try:
import pylab
except:
print "pylab not found: see https://networkx.lanl.gov/Drawing.html for info"
raise
import networkx as net
G = net.grid_2d_graph(4,4) #4x4 grid
pos = net.spring_layout(G)
net.draw(G,pos,alpha=0.5,with_labels=False)
net.draw(G,pos,nodelist=[1,2,3,4],node_color='b') # blue
pylab.savefig("grid.png") # save as png
pylab.show() # display
···
--
Charles R. Twardy