matplotlib/__init__.py : gs version parsing problem

Community matplotlib-users
1

Hi,

Quoting matplotlib/__init__.py :

def checkdep_ghostscript():
    try:
        if sys.platform == 'win32':
            command = 'gswin32c -v'
        else:
            command = 'gs -v'
        stdin, stdout = os.popen4(command)
        line = stdout.readlines()[0]
        v = line.split()[2]
        vtest = '.'.join(v.split('.')[:2]) # deal with version numbers like '7.07.1'
        float(vtest)
        return vtest
    except (IndexError, ValueError):
        return None

It fails on debian sid because 'gs -v' returns "GPL Ghostscript SVN PRE-RELEASE 8.61 (2007-08-02)\n"

Anyway, the parser will be ugly because it has to deal with version numbers like '7.07.1'.
Should I propose a trivial patch to get thinks working on debian sid ?

Xavier
ps :Why is there no standard way (like -v or --version) on *unix to get the version *number*?? Only the version number. Why :frowning:

···

--
############################################
Xavier Gnata
CRAL - Observatoire de Lyon
9, avenue Charles Andr�
69561 Saint Genis Laval cedex
Phone: +33 4 78 86 85 28
Fax: +33 4 78 86 83 86
E-mail: gnata@...419...
############################################

2

This was fixed a while back in svn, but thanks for the report. It turns out
that --version does return only the version number.

Darren

···

On Friday 16 November 2007 10:28:25 am Xavier Gnata wrote:

Hi,

Quoting matplotlib/__init__.py :

def checkdep_ghostscript():
    try:
        if sys.platform == 'win32':
            command = 'gswin32c -v'
        else:
            command = 'gs -v'
        stdin, stdout = os.popen4(command)
        line = stdout.readlines()[0]
        v = line.split()[2]
        vtest = '.'.join(v.split('.')[:2]) # deal with version numbers
like '7.07.1'
        float(vtest)
        return vtest
    except (IndexError, ValueError):
        return None

It fails on debian sid because 'gs -v' returns "GPL Ghostscript SVN
PRE-RELEASE 8.61 (2007-08-02)\n"

Anyway, the parser will be ugly because it has to deal with version
numbers like '7.07.1'.
Should I propose a trivial patch to get thinks working on debian sid ?

Xavier
ps :Why is there no standard way (like -v or --version) on *unix to get
the version *number*?? Only the version number. Why :frowning:

3

Darren Dale wrote:

  

Hi,

Quoting matplotlib/__init__.py :

def checkdep_ghostscript():
    try:
        if sys.platform == 'win32':
            command = 'gswin32c -v'
        else:
            command = 'gs -v'
        stdin, stdout = os.popen4(command)
        line = stdout.readlines()[0]
        v = line.split()[2]
        vtest = '.'.join(v.split('.')[:2]) # deal with version numbers
like '7.07.1'
        float(vtest)
        return vtest
    except (IndexError, ValueError):
        return None

It fails on debian sid because 'gs -v' returns "GPL Ghostscript SVN
PRE-RELEASE 8.61 (2007-08-02)\n"

Anyway, the parser will be ugly because it has to deal with version
numbers like '7.07.1'.
Should I propose a trivial patch to get thinks working on debian sid ?

Xavier
ps :Why is there no standard way (like -v or --version) on *unix to get
the version *number*?? Only the version number. Why :frowning:
    
This was fixed a while back in svn, but thanks for the report. It turns out that --version does return only the version number.

Darren

Unfortunately, I'm not able to get the svn version working :
imshow always fails :
/usr/lib/python2.4/site-packages/matplotlib/pyplot.py in imshow(*args, **kwargs)
   1673 hold(h)
   1674 try:
-> 1675 ret = gca().imshow(*args, **kwargs)
   1676 draw_if_interactive()
   1677 except:

/usr/lib/python2.4/site-packages/matplotlib/axes.py in imshow(self, X, cmap, norm, aspect, interpolation, alpha, vmin, vmax, origin, extent, shape, filternorm, filterrad, imlim, **kwargs)
   4435 im.autoscale_None()
   4436
-> 4437 xmin, xmax, ymin, ymax = im.get_extent()
   4438
   4439 corners = (xmin, ymin), (xmax, ymax)

/usr/lib/python2.4/site-packages/matplotlib/image.py in get_extent(self)
    286 sz = self.get_size()
    287 #print 'sz', sz
--> 288 numrows, numcols = sz
    289 if self.origin == 'upper':
    290 return (-0.5, numcols-0.5, numrows-0.5, -0.5)

ValueError: need more than 1 value to unpack

but it is another topic.

Xavier.

···

On Friday 16 November 2007 10:28:25 am Xavier Gnata wrote:

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--
############################################
Xavier Gnata
CRAL - Observatoire de Lyon
9, avenue Charles Andr�
69561 Saint Genis Laval cedex
Phone: +33 4 78 86 85 28
Fax: +33 4 78 86 83 86
E-mail: gnata@...419...
############################################

4

It looks like you may be passing in a 1D array to imshow or to
im.set_array. Could you post a code sample?

JDH

···

On Nov 16, 2007 10:03 AM, Xavier Gnata <gnata@...419...> wrote:

/usr/lib/python2.4/site-packages/matplotlib/image.py in get_extent(self)
    286 sz = self.get_size()
    287 #print 'sz', sz
--> 288 numrows, numcols = sz
    289 if self.origin == 'upper':
    290 return (-0.5, numcols-0.5, numrows-0.5, -0.5)

ValueError: need more than 1 value to unpack

but it is another topic.

5

Xavier Gnata wrote:

Hi,

Quoting matplotlib/__init__.py :

def checkdep_ghostscript():
    try:
        if sys.platform == 'win32':
            command = 'gswin32c -v'
        else:
            command = 'gs -v'
        stdin, stdout = os.popen4(command)
        line = stdout.readlines()[0]
        v = line.split()[2]
        vtest = '.'.join(v.split('.')[:2]) # deal with version numbers
like '7.07.1'
        float(vtest)
        return vtest
    except (IndexError, ValueError):
        return None

It fails on debian sid because 'gs -v' returns "GPL Ghostscript SVN
PRE-RELEASE 8.61 (2007-08-02)\n"

Anyway, the parser will be ugly because it has to deal with version
numbers like '7.07.1'.
Should I propose a trivial patch to get thinks working on debian sid ?

Xavier
ps :Why is there no standard way (like -v or --version) on *unix to get
the version *number*?? Only the version number. Why :frowning:

--
############################################
Xavier Gnata
CRAL - Observatoire de Lyon
9, avenue Charles André
69561 Saint Genis Laval cedex
Phone: +33 4 78 86 85 28
Fax: +33 4 78 86 83 86
E-mail: gnata@...419...
############################################

-------------------------------------------------------------------------
This SF.net email is sponsored by: Microsoft
Defy all challenges. Microsoft(R) Visual Studio 2005.
http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/
_______________________________________________
Matplotlib-users mailing list
Matplotlib-users@lists.sourceforge.net
matplotlib-users List Signup and Options

Yeah , I did face the same problem . My code is following:
There seems to be something wrong in "ax.imshow(im)", I can't get the answer
, Can sb help me .
The error message"ValueError: need more than 0 values to unpack"
Thank you .

# -*- coding:gb2312 -*-
import wx
from pylab import *
from matplotlib.backends.backend_wx import FigureCanvasWx
from matplotlib.figure import Figure
from matplotlib.axes import *
from numpy import *

···

#-------------------------------------------------------------
x=array(range(0,100))
y=array(range(0,100))
z=rand(100,100)
figure(1)
im=imshow(z, interpolation='bilinear', origin='lower',cmap=cm.gray,
extent=(0,100,0,100))
levels = arange(0.3, 0.4, 0.9)
contour(x,y,z,levels,origin='lower',linewidths=2,extent=(0,100,0,100))

fig=figure(2)
ax = fig.add_subplot(111)
ax.imshow(im)
ax.set_xlim(0,3)
ax.set_ylim(0,2)
show()

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6

Xavier Gnata wrote:
> Hi,
>
> Quoting matplotlib/__init__.py :
>
> def checkdep_ghostscript():
> try:
> if sys.platform == 'win32':
> command = 'gswin32c -v'
> else:
> command = 'gs -v'
> stdin, stdout = os.popen4(command)
> line = stdout.readlines()[0]
> v = line.split()[2]
> vtest = '.'.join(v.split('.')[:2]) # deal with version numbers
> like '7.07.1'
> float(vtest)
> return vtest
> except (IndexError, ValueError):
> return None
>
> It fails on debian sid because 'gs -v' returns "GPL Ghostscript SVN
> PRE-RELEASE 8.61 (2007-08-02)\n"
>
> Anyway, the parser will be ugly because it has to deal with version
> numbers like '7.07.1'.
> Should I propose a trivial patch to get thinks working on debian sid ?
>
> Xavier
> ps :Why is there no standard way (like -v or --version) on *unix to get
> the version *number*?? Only the version number. Why :frowning:
>
> --
> ############################################
> Xavier Gnata
> CRAL - Observatoire de Lyon
> 9, avenue Charles André
> 69561 Saint Genis Laval cedex
> Phone: +33 4 78 86 85 28
> Fax: +33 4 78 86 83 86
> E-mail: gnata@...419...
> ############################################
>
>
> -------------------------------------------------------------------------
> This SF.net email is sponsored by: Microsoft
> Defy all challenges. Microsoft(R) Visual Studio 2005.
> http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/
> _______________________________________________
> Matplotlib-users mailing list
> Matplotlib-users@lists.sourceforge.net
> matplotlib-users List Signup and Options

Yeah , I did face the same problem . My code is following:
There seems to be something wrong in "ax.imshow(im)", I can't get the
answer , Can sb help me .

The imshow documentation says "X may be a float array, a uint8 array or a PIL
image", but you are passing it an AxesImage instance, which wont work.

···

On Sunday 02 December 2007 06:55:01 am hjc520070 wrote:

The error message"ValueError: need more than 0 values to unpack"
Thank you .

# -*- coding:gb2312 -*-
import wx
from pylab import *
from matplotlib.backends.backend_wx import FigureCanvasWx
from matplotlib.figure import Figure
from matplotlib.axes import *
from numpy import *

#-------------------------------------------------------------
x=array(range(0,100))
y=array(range(0,100))
z=rand(100,100)
figure(1)
im=imshow(z, interpolation='bilinear', origin='lower',cmap=cm.gray,
extent=(0,100,0,100))
levels = arange(0.3, 0.4, 0.9)
contour(x,y,z,levels,origin='lower',linewidths=2,extent=(0,100,0,100))

fig=figure(2)
ax = fig.add_subplot(111)
ax.imshow(im)
ax.set_xlim(0,3)
ax.set_ylim(0,2)
show()