error with pyplot

[andreall]

I have been using wafo (spectrum.models and objects) for some time without any problems. I recently updated anaconda and when trying to use a program that used wafo I found that

plt.figure()

gives the following error:

{ValueError}max() arg is an empty sequence

I have found that it is wafo which is causing this since when I do import matplotlib.pyplot as plt and plt.figure() before any kind of 'wafo' import it works and after it doesn't. I have found that the line messing with pyplot is from wafo.plotbackend import plotbackend as plt but I'm not sure how it will affect the overall behavior if I change this line everywhere. Has anyone experienced the same issue? Thanks!

[pbrod]

I am not able to reproduce this. Could you supply a complete example and supply the version of anaconda, matplotlib and wafo?

[andreall]

I’m using python 2.7.13, anaconda 5.0.0., matplotlib 2.0.2, and for wafo I did a pull today from the master (not sure of the version number). I’m using Pycharm 2018.1 on scientific mode. I’m working with this example: import matplotlib.pyplot as plt plt.figure() import wafo plt.figure() It crashes after the second plt.figure(). The error is on matplotlib.tight_layout() so I will try to continue to figure out exactly where it is. This is the complete message I get: Python 2.7.13 |Anaconda, Inc.| (default, Sep 21 2017, 17:38:20) [GCC 4.2.1 Compatible Clang 4.0.1 (tags/RELEASE_401/final)] on darwin Error in callback <function post_execute at 0x104eac500> (for post_execute): Traceback (most recent call last): File "/Users/andrealira/anaconda/lib/python2.7/site-packages/IPython/core/events.py", line 74, in trigger func(*args, **kwargs) File "/Users/andrealira/anaconda/lib/python2.7/site-packages/matplotlib/pyplot.py", line 149, in post_execute draw_all() File "/Users/andrealira/anaconda/lib/python2.7/site-packages/matplotlib/_pylab_helpers.py", line 150, in draw_all f_mgr.canvas.draw_idle() File "/Users/andrealira/anaconda/lib/python2.7/site-packages/matplotlib/backend_bases.py", line 2040, in draw_idle self.draw(*args, **kwargs) File "/Applications/PyCharm.app/Contents/helpers/pycharm_matplotlib_backend/backend_interagg.py", line 94, in draw self.show() File "/Applications/PyCharm.app/Contents/helpers/pycharm_matplotlib_backend/backend_interagg.py", line 62, in show self.figure.tight_layout() File "/Users/andrealira/anaconda/lib/python2.7/site-packages/matplotlib/figure.py", line 1753, in tight_layout rect=rect) File "/Users/andrealira/anaconda/lib/python2.7/site-packages/matplotlib/tight_layout.py", line 326, in get_tight_layout_figure max_nrows = max(nrows_list) ValueError: max() arg is an empty sequence Thanks,

…

On 7 Apr 2018, at 12:00, Per A. Brodtkorb ***@***.***> wrote: I am not able to reproduce this. Could you supply a complete example and supply the version of anaconda, matplotlib and wafo? — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#38 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AYNMkMUvhKYZl4AiD6XIV_9PMrBCpgyxks5tmI5KgaJpZM4TLAm->.

[pbrod]

I am still not able to reproduce this. However, you could try to uncomment line 18 in plotbackend.py:

 plotbackend.interactive(True)