AttributeError with big float Value(s)

[ElricleNecro]

When I use some important value in my plot, i get the error :

Exception in Tkinter callback
Traceback (most recent call last):
  File "/usr/lib/python3.3/tkinter/__init__.py", line 1442, in __call__
    return self.func(*args)
  File "/usr/lib/python3.3/site-packages/matplotlib/backends/backend_tkagg.py", line 276, in resize
    self.show()
  File "/usr/lib/python3.3/site-packages/matplotlib/backends/backend_tkagg.py", line 348, in draw
    FigureCanvasAgg.draw(self)
  File "/usr/lib/python3.3/site-packages/matplotlib/backends/backend_agg.py", line 439, in draw
    self.figure.draw(self.renderer)
  File "/usr/lib/python3.3/site-packages/matplotlib/artist.py", line 55, in draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "/usr/lib/python3.3/site-packages/matplotlib/figure.py", line 1000, in draw
    func(*args)
  File "/usr/lib/python3.3/site-packages/matplotlib/artist.py", line 55, in draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "/usr/lib/python3.3/site-packages/matplotlib/axes.py", line 2088, in draw
    a.draw(renderer)
  File "/usr/lib/python3.3/site-packages/matplotlib/artist.py", line 55, in draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "/usr/lib/python3.3/site-packages/matplotlib/axis.py", line 1049, in draw
    ticks_to_draw = self._update_ticks(renderer)
  File "/usr/lib/python3.3/site-packages/matplotlib/axis.py", line 936, in _update_ticks
    tick_tups = [t for t in self.iter_ticks()]
  File "/usr/lib/python3.3/site-packages/matplotlib/axis.py", line 936, in <listcomp>
    tick_tups = [t for t in self.iter_ticks()]
  File "/usr/lib/python3.3/site-packages/matplotlib/axis.py", line 882, in iter_ticks
    self.major.formatter.set_locs(majorLocs)
  File "/usr/lib/python3.3/site-packages/matplotlib/ticker.py", line 483, in set_locs
    self._set_format(vmin, vmax)
  File "/usr/lib/python3.3/site-packages/matplotlib/ticker.py", line 550, in _set_format
    if np.abs(locs - np.round(locs, decimals=sigfigs)).max() < thresh:
  File "/usr/lib/python3.3/site-packages/numpy/core/fromnumeric.py", line 2402, in round_
    return round(decimals, out)
AttributeError: 'float' object has no attribute 'rint'

Here is a little piece of code which reproduces the error :

from matplotlib import pyplot as plt
import numpy as np

x = np.arange(0, 3, 1)
y = x*1e35

print(y)

plt.ioff()
plt.plot(x, y)
plt.show()

[pelson]

I can't reproduce this on my RHELinux 64bit machine with python2.7, mpl 1.3.x, tkagg backend, and numpy 1.6. Can you provide some details about your setup? Have you got python2.7 to give this a go on?

Cheers,

[ElricleNecro]

I am using mpl 1.3.x (tested with 1.2.0 too) with tkagg backend, numpy 1.7 (but the string matplotlib.version__numpy indicate 1.4, numpy.version gives me 1.7), python 3.3, ipython 0.13.1
For the OS: archlinux 64bit.

cheers,

EDIT: tested on python2.7 with mpl 1.3.X, tkagg backend and numpy 1.6.1, and it's working. This bug seems to be specific to python 3.3.

[WeatherGod]

On Mon, Mar 18, 2013 at 6:14 AM, GuillaumePlum notifications@github.comwrote:

I am using mpl 1.3.x (tested with 1.2.0 too) with tkagg backend, numpy 1.7
(but the string matplotlib.version__numpy indicate 1.4,
numpy.version gives me 1.7), python 3.3, ipython 0.13.1
For the OS: archlinux 64bit.

Just to note, matplotlib.version__numpy merely indicates the lowest
version of numpy that is supported by matplotlib.

[dmcdougall]

I can't reproduce this on OS X 10.8 64 bit with python 2.7, mpl 1.2.x, gtkagg backend and numpy 1.6.2.

[ElricleNecro]

Like I've said above, this bug seems to be specific to python 3.

I've tested it on different configuration using python3.2 and python3.3 with mpl 1.2.X and 1.3.x (git version), using different Linux distribution (ArchLinux, Debian, Ubuntu), in case of I've broke something.

But when using python2.7, it's all working... It's a little weird. Adding print to every variable used in those functions (set_format and round) seems useless, they're printing the same thing.

(Sorry for the english!)

[tomcraw00]

I have the same issue:
Python 3.3, matplotlib 1.3.x (latest trunk), numpy 1.7
OS X 10.8 mountain lion, macbook pro retina

I cannot plot a number > 8.9999E+19

/usr/local/lib/python3.3/site-packages/numpy/core/fromnumeric.py in round_(a=array([0.0, 0.2, 0.4, 0.6, 0.8, 1.0], dtype=object), decimals=3, out=None)
2400 except AttributeError:
2401 return _wrapit(a, 'round', decimals, out)
-> 2402 return round(decimals, out)
round = <built-in method round of numpy.ndarray object at 0x7fce4cae9990>
decimals = 3
out = None
2403
2404

[mdboom]

Strange -- I can't reproduce on Python 3.3, Numpy 1.7.1, matplotlib 1.2.x branch on Linux (Fedora 18). Any chance you can run this in pdb and print the value of "decimals" in the innermost stack frame?

[ElricleNecro]

Just before the exception in the round_ function, i have:

a = [0.0 0.5 1.0 1.5 2.0]
decimals = 3
out = None

Using the code give in the first post.

[2sn]

It's not an overflow, but current numpy 1.7.1 does not like to convert huge integers that python 3.3 produces into np data types. Instead, it saves them as an object (dtype=object, the object type is builtins.int). Not sure this is a feature or a bug (of numpy). Probably a feature - someone must have thought that would be clever. Instead of producing an overflow.

In [1]: np.array([10**25])
Out[1]: array([10000000000000000000000000], dtype=object)

In [2]: x = np.array([10**25])
In [3]: x[0].dtype

AttributeError Traceback (most recent call last)
in ()
----> 1 x[0].dtype

AttributeError: 'int' object has no attribute 'dtype'

In [4]: type(x[0])
Out[4]: builtins.int

In [5]: np.array([10**5])
Out[5]: array([100000])

In [7]: x = np.array([10**5])

In [8]: type(x[0])
Out[8]: numpy.int64

[mdboom]

Fixed by #1991.