47s E               ImportError: Cannot load backend 'TkAgg' which requires the 'tk' interactive framework, as 'headless' is currently running

Failurelog:t=Tomato(metric="euclidean",graph_type="radius",r=4.7,k=4)81047st.fit(a)81147sassertt.max_weight_per_cc_.size==281247sassertt.neighbors_== [[0,1,2], [0,1,2], [0,1,2], [3,4,5,6], [3,4,5], [3,4,5], [3,6]]81347s>t.plot_diagram()81447s81547stest/test_tomato.py:41:81647s _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _81747s/usr/lib/python3/dist-packages/gudhi/clustering/tomato.py:288:inplot_diagram81847splt.plot([l,r], [l,r])81947s/usr/lib/python3/dist-packages/matplotlib/pyplot.py:3829:inplot82047sreturngca().plot(82147s/usr/lib/python3/dist-packages/matplotlib/pyplot.py:2776:ingca82247sreturngcf().gca()82347s/usr/lib/python3/dist-packages/matplotlib/pyplot.py:1108:ingcf82447sreturnfigure()82547s/usr/lib/python3/dist-packages/matplotlib/pyplot.py:1042:infigure82647smanager=new_figure_manager(82747s/usr/lib/python3/dist-packages/matplotlib/pyplot.py:551:innew_figure_manager82847s_warn_if_gui_out_of_main_thread()82947s/usr/lib/python3/dist-packages/matplotlib/pyplot.py:528:in_warn_if_gui_out_of_main_thread83047scanvas_class=cast(type[FigureCanvasBase],_get_backend_mod().FigureCanvas)83147s/usr/lib/python3/dist-packages/matplotlib/pyplot.py:369:in_get_backend_mod83247sswitch_backend(rcParams._get("backend"))83347s _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _83447s83547snewbackend='TkAgg'83647s83747sdefswitch_backend(newbackend:str)->None:83847s"""839 47s         Set the pyplot backend.840 47s841 47s         Switching to an interactive backend is possible only if no event loop for842 47s         another interactive backend has started.  Switching to and from843 47s         non-interactive backends is always possible.844 47s845 47s         If the new backend is different than the current backend then all open846 47s         Figures will be closed via ``plt.close('all')``.847 47s848 47s         Parameters849 47s         ----------850 47s         newbackend : str851 47s             The case-insensitive name of the backend to use.852 47s853 47s         """85447sglobal_backend_mod85547s# make sure the init is pulled up so we can assign to it later85647simportmatplotlib.backends85747s85847sifnewbackendisrcsetup._auto_backend_sentinel:85947scurrent_framework=cbook._get_running_interactive_framework()86047s86147sif (current_frameworkand86247s                     (backend:=backend_registry.backend_for_gui_framework(86347scurrent_framework))):86447scandidates= [backend]86547selse:86647scandidates= []86747scandidates+= [86847s"macosx","qtagg","gtk4agg","gtk3agg","tkagg","wxagg"]86947s87047s# Don't try to fallback on the cairo-based backends as they each have87147s# an additional dependency (pycairo) over the agg-based backend, and87247s# are of worse quality.87347sforcandidateincandidates:87447stry:87547sswitch_backend(candidate)87647sexceptImportError:87747scontinue87847selse:87947srcParamsOrig['backend']=candidate88047sreturn88147selse:88247s# Switching to Agg should always succeed; if it doesn't, let the88347s# exception propagate out.88447sswitch_backend("agg")88547srcParamsOrig["backend"]="agg"88647sreturn88747sold_backend=rcParams._get('backend')# get without triggering backend resolution88847s88947smodule=backend_registry.load_backend_module(newbackend)89047scanvas_class=module.FigureCanvas89147s89247srequired_framework=canvas_class.required_interactive_framework89347sifrequired_frameworkisnotNone:89447scurrent_framework=cbook._get_running_interactive_framework()89547sif (current_frameworkandrequired_framework89647sandcurrent_framework!=required_framework):89747s>raiseImportError(89847s"Cannot load backend {!r} which requires the {!r} interactive "89947s"framework, as {!r} is currently running".format(90047snewbackend,required_framework,current_framework))90147sEImportError:Cannotloadbackend'TkAgg'whichrequiresthe'tk'interactiveframework,as'headless'iscurrentlyrunning90247s