importmatplotlib.pyplotaspltimportnumpyasnpfromdatetimeimportdatetime,timedeltafromcollectionsimportdefaultdictimportpytestimportmatplotlibasmpl@pytest.mark.xfail(reason="Test for violinplot not written yet")@mpl.style.context("default")classTestViolinPlot:deftest_violinplot(self):np.random.seed(42)n_samples=100dates_values= [(datetime(2023,1,1)+timedelta(days=np.random.randint(1,15)),np.random.randn())for_inrange(n_samples)]values_by_date=defaultdict(list)fordate,valueindates_values:values_by_date[date.toordinal()].append(value)date_ordinals,values=zip(*values_by_date.items())date_timedeltas= [datetime.fromordinal(date)-datetime(2023,1,1)fordateindate_ordinals]fig,ax=plt.subplots()result=ax.violinplot(values,positions=date_timedeltas,widths=timedelta(days=5),showmeans=True,showextrema=True)ax.set_title('Violin Plot with DateTime and Timedelta Positions')ax.set_xticks(date_timedeltas)ax.set_xticklabels([datetime.fromordinal(date).strftime('%Y-%m-%d')fordateindate_ordinals],rotation=45,ha='right')ax.set_xlabel('Dates')ax.set_ylabel('Values')assertresultisnotNone,"Failed to create violin plot"

=================================================testsessionstarts=================================================platformwin32--Python3.11.5,pytest-7.4.3,pluggy-1.3.0Matplotlib:3.8.2Freetype:2.6.1rootdir:C:\Users\XXXXplugins:anyio-3.5.0,asdf-3.0.1,mpl-0.16.1collected1itemXXXX\test_untitled2.pyx                                                                             [100%]=================================================1xfailedin0.50s==================================================

fromdatetimeimportdatetime,timedeltaimportnumpyasnpimportmatplotlib.pyplotaspltnp.random.seed(19680801)n_samples=100values=np.random.randn(n_samples)fig,ax=plt.subplots()result=ax.violinplot(values,positions=[datetime(2023,1,10)],widths=[timedelta(days=10)],showmeans=True,showextrema=True)