Hi, Finally I worked it out. It is the LANG environment setting is not set in a Ubuntu docker environment. In non-docker environment, LANG is by default set to "en_US.UTF-8". I have to add an extra command to set the value in the docker before starting zeppelin instance.
If you are interested, you may take a look at https://hub.docker.com/r/davidshen84/zeppelin/ On Sat, Sep 17, 2016 at 6:01 PM Xi Shen <davidshe...@gmail.com> wrote: > I think it has nothing to do with docker. It relates to the matploblib > settings. I don't know why, but in some other cases, I found matplotlib > will use Agg as the backend by default. > > To solve your problem, just make sure you run this as the first thing when > you start your Zeppelin environment. > > %python > > import matplotlib > matplotlib.use('Agg') > > > > On Sat, Sep 17, 2016 at 4:27 PM afancy <grou...@gmail.com> wrote: > >> But, mine is not in docker environment. >> >> afancy >> >> On Fri, Sep 16, 2016 at 2:10 PM, afancy <grou...@gmail.com> wrote: >> >>> Hi, >>> >>> Has this problem been solved? I also encountered the same problem (see >>> the following). I build from the source pulled from the Master branch. >>> >>> /afancy >>> >>> %python plt.figure() plt.plot(x, f(x), lw=2) z.show(plt, width='500px') >>> plt.close() >>> >>> raceback (most recent call last): >>> File "<stdin>", line 1, in <module> >>> File "/usr/lib/pymodules/python2.7/matplotlib/pyplot.py", line 423, in >>> figure >>> **kwargs) >>> File >>> "/usr/lib/pymodules/python2.7/matplotlib/backends/backend_tkagg.py", line >>> 79, in new_figure_manager >>> return new_figure_manager_given_figure(num, figure) >>> File >>> "/usr/lib/pymodules/python2.7/matplotlib/backends/backend_tkagg.py", line >>> 87, in new_figure_manager_given_figure >>> window = Tk.Tk() >>> File "/usr/lib/python2.7/lib-tk/Tkinter.py", line 1767, in __init__ >>> self.tk = _tkinter.create(screenName, baseName, className, interactive, >>> wantobjects, useTk, sync, use) >>> _tkinter.TclError: no display name and no $DISPLAY environment variable >>> Traceback (most recent call last): >>> File "<stdin>", line 1, in <module> >>> File "/usr/lib/pymodules/python2.7/matplotlib/pyplot.py", line 2980, in >>> plot >>> ax = gca() >>> File "/usr/lib/pymodules/python2.7/matplotlib/pyplot.py", line 803, in >>> gca >>> ax = gcf().gca(**kwargs) >>> File "/usr/lib/pymodules/python2.7/matplotlib/pyplot.py", line 450, in >>> gcf >>> return figure() >>> File "/usr/lib/pymodules/python2.7/matplotlib/pyplot.py", line 423, in >>> figure >>> **kwargs) >>> File >>> "/usr/lib/pymodules/python2.7/matplotlib/backends/backend_tkagg.py", line >>> 79, in new_figure_manager >>> return new_figure_manager_given_figure(num, figure) >>> File >>> "/usr/lib/pymodules/python2.7/matplotlib/backends/backend_tkagg.py", line >>> 87, in new_figure_manager_given_figure >>> window = Tk.Tk() >>> File "/usr/lib/python2.7/lib-tk/Tkinter.py", line 1767, in __init__ >>> self.tk = _tkinter.create(screenName, baseName, className, interactive, >>> wantobjects, useTk, sync, use) >>> _tkinter.TclError: no display name and no $DISPLAY environment variable >>> Traceback (most recent call last): >>> File "<stdin>", line 1, in <module> >>> File "<stdin>", line 22, in show >>> File "<stdin>", line 63, in show_matplotlib >>> File "/usr/lib/pymodules/python2.7/matplotlib/pyplot.py", line 560, in >>> savefig >>> fig = gcf() >>> File "/usr/lib/pymodules/python2.7/matplotlib/pyplot.py", line 450, in >>> gcf >>> return figure() >>> File "/usr/lib/pymodules/python2.7/matplotlib/pyplot.py", line 423, in >>> figure >>> **kwargs) >>> File >>> "/usr/lib/pymodules/python2.7/matplotlib/backends/backend_tkagg.py", line >>> 79, in new_figure_manager >>> return new_figure_manager_given_figure(num, figure) >>> File >>> "/usr/lib/pymodules/python2.7/matplotlib/backends/backend_tkagg.py", line >>> 87, in new_figure_manager_given_figure >>> window = Tk.Tk() >>> File "/usr/lib/python2.7/lib-tk/Tkinter.py", line 1767, in __init__ >>> self.tk = _tkinter.create(screenName, baseName, className, interactive, >>> wantobjects, useTk, sync, use) >>> _tkinter.TclError: no display name and no $DISPLAY environment variable >>> >>> On Thu, Sep 15, 2016 at 3:16 AM, Xi Shen <davidshe...@gmail.com> wrote: >>> >>>> I think I found the cause. I think it is font problem. In docker >>>> environment, it only has a small set of fonts installed. But I have not >>>> find out which font should I install...I will update you guys later. >>>> >>>> On Thu, Sep 15, 2016, 00:33 moon soo Lee <m...@apache.org> wrote: >>>> >>>>> Tried x = np.arange(100), x = np.linspace(-2,2,1000) with both python2 >>>>> and python3 in %python interpreter. I don't have any problem. >>>>> >>>>> >>>>> On Wed, Sep 14, 2016 at 3:12 AM Xi Shen <davidshe...@gmail.com> wrote: >>>>> >>>>>> OK, for this problem, it is discussed at >>>>>> https://stackoverflow.com/questions/15538099/conversion-of-unicode-minus-sign-from-matplotlib-ticklabels >>>>>> >>>>>> However, I just tried with Jupyter notebook, and its matplotlib can >>>>>> plot with negative values on the axes correctly, and >>>>>> matplotlib.rcParams['axes.unicode_minus'] = True. >>>>>> >>>>>> Can you guys please check if this only happens to a Python3 >>>>>> environment? I don't think I am the first one hit this problem. >>>>>> >>>>>> >>>>>> >>>>>> On Wed, Sep 14, 2016 at 5:49 PM Xi Shen <davidshe...@gmail.com> >>>>>> wrote: >>>>>> >>>>>>> Hi, >>>>>>> >>>>>>> I worked it out...So I have start a new instance of >>>>>>> Zeppelin...creating a new notebook wont take effect...So all the Python >>>>>>> code are executed in one python vm? Shouldn't separating ones are >>>>>>> better? >>>>>>> >>>>>>> After I get matplotlib work, I have a new problem. >>>>>>> >>>>>>> This code snippet works >>>>>>> %python >>>>>>> >>>>>>> import numpy as np >>>>>>> import matplotlib.pyplot as plt >>>>>>> >>>>>>> x = np.arange(100) >>>>>>> >>>>>>> plt.figure() >>>>>>> plt.plot(x, x**2) >>>>>>> z.show(plt, width='300px') >>>>>>> plt.close() >>>>>>> >>>>>>> But if I change x value to x= np.linspace(-2, 2, 1000), as it it >>>>>>> used in the example, I got >>>>>>> >>>>>>> <matplotlib.figure.Figure object at 0x7fa177d197b8> >>>>>>> [<matplotlib.lines.Line2D object at 0x7fa177ecf080>] >>>>>>> >>>>>>> Traceback (most recent call last): >>>>>>> File "<stdin>", line 1, in <module> >>>>>>> File "<stdin>", line 23, in show >>>>>>> File "<stdin>", line 69, in show_matplotlib >>>>>>> UnicodeEncodeError: 'ascii' codec can't encode character '\u2212' in >>>>>>> position 17262: ordinal not in range(128) >>>>>>> >>>>>>> I did some testing, and I found if any of the value passed to plot() >>>>>>> contains negative numbers, I will get this error...very odd. >>>>>>> >>>>>>> >>>>>>> >>>>>>> On Wed, Sep 14, 2016 at 8:50 AM Felix Cheung < >>>>>>> felixcheun...@hotmail.com> wrote: >>>>>>> >>>>>>>> And >>>>>>>> matplotlib.use('Agg') >>>>>>>> >>>>>>>> Would only work before matplotlib is first used so you would need >>>>>>>> to restart the interpreter. From error stack below it looks like >>>>>>>> something >>>>>>>> might be setting the default backend in matplotlib to TkAgg though. >>>>>>>> >>>>>>>> Are you using the Python interpreter or PySpark interpreter? Also >>>>>>>> how you are calling matplotlib like Moon asks? >>>>>>>> >>>>>>>> _____________________________ >>>>>>>> From: moon soo Lee <m...@apache.org> >>>>>>>> Sent: Tuesday, September 13, 2016 2:34 PM >>>>>>>> Subject: Re: Matplotlib uses tkinter instead of Agg >>>>>>>> To: <users@zeppelin.apache.org> >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> Hi, >>>>>>>> >>>>>>>> Thanks for sharing the problem. >>>>>>>> Could you share which version of Zeppelin are you using and how did >>>>>>>> you try matplotlib inside of Zeppelin? Are you trying matplotlib >>>>>>>> with z.show() ? >>>>>>>> >>>>>>>> Thanks, >>>>>>>> moon >>>>>>>> >>>>>>>> On Tue, Sep 13, 2016 at 1:56 AM Xi Shen <davidshe...@gmail.com> >>>>>>>> wrote: >>>>>>>> >>>>>>>>> Hi, >>>>>>>>> >>>>>>>>> I want to build a Zeppelin docker image for my self. The docker >>>>>>>>> image is based on ubuntu:wily, and has openjdk-8-jre and python3 >>>>>>>>> installed. >>>>>>>>> I also installed other packages that I need. >>>>>>>>> >>>>>>>>> After started Zeppelin in the docker, I am able to access the >>>>>>>>> webapp from my local browser. I tried to execute some simple Python >>>>>>>>> script, >>>>>>>>> and it works fine. But when I try to run the matplotlib example, I got >>>>>>>>> error saying that tkinter cannot find the $DISPLAY. >>>>>>>>> >>>>>>>>> Traceback (most recent call last): >>>>>>>>> File "<stdin>", line 1, in <module> >>>>>>>>> File >>>>>>>>> "/usr/local/lib/python3.4/dist-packages/matplotlib/pyplot.py", line >>>>>>>>> 535, in >>>>>>>>> figure >>>>>>>>> **kwargs) >>>>>>>>> File >>>>>>>>> "/usr/local/lib/python3.4/dist-packages/matplotlib/backends/backend_tkagg.py", >>>>>>>>> line 84, in new_figure_manager >>>>>>>>> return new_figure_manager_given_figure(num, figure) >>>>>>>>> File >>>>>>>>> "/usr/local/lib/python3.4/dist-packages/matplotlib/backends/backend_tkagg.py", >>>>>>>>> line 92, in new_figure_manager_given_figure >>>>>>>>> window = Tk.Tk() >>>>>>>>> File "/usr/lib/python3.4/tkinter/__init__.py", line 1859, in >>>>>>>>> __init__ >>>>>>>>> self.tk = _tkinter.create(screenName, baseName, className, >>>>>>>>> interactive, wantobjects, useTk, sync, use) >>>>>>>>> _tkinter.TclError: no display name and no $DISPLAY environment >>>>>>>>> variable >>>>>>>>> >>>>>>>>> Some people on the Internet suggested adding matplotlib.use('Agg') >>>>>>>>> at the beginning of the notebook, but it still does not work for me. >>>>>>>>> >>>>>>>>> -- >>>>>>>>> >>>>>>>>> >>>>>>>>> Thanks, >>>>>>>>> David S. >>>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> -- >>>>>>> >>>>>>> >>>>>>> Thanks, >>>>>>> David S. >>>>>>> >>>>>> -- >>>>>> >>>>>> >>>>>> Thanks, >>>>>> David S. >>>>>> >>>>> -- >>>> >>>> >>>> Thanks, >>>> David S. >>>> >>> >>> >> -- > > > Thanks, > David S. > -- Thanks, David S.
