matplotlib - Python - Adding marker option to plot gives error -


hi i'm trying add markers python plots using mark every option. when add following error: valueerror: many values unpack. i'm not sure causing it. below code.

    temp = pd.read_csv(path+filename)     temp=pd.dataframe(temp).convert_objects(convert_numeric=true)      fig,axes = plt.subplots(nrows=2,ncols=1)     fig.subplots_adjust(hspace=1)     fig = plt.figure()     markers_on=[887,1661,2631,3406,4714,5606,6880,8332,9751]     fig.subplots_adjust(hspace=.5)     fig.suptitle('bc attributes', fontsize=12)     plt.subplot(3,1,1)     plt.plot(temp.index,temp.bc_t_node0_cpu0_temp, marker='s', markevery=[887,1661,2631,3406,4714,5606,6880,8332,9751])     plt.xlabel('time')     plt.ylabel('node0 cpu0 temp')     plt.subplot(3,1,2)     plt.plot(temp.index, temp.bc_t_node0_cpu1_temp, marker='s', markevery=[887,1661,2631,3406,4714,5606,6880,8332,9751])     plt.xlabel('time')     plt.ylabel('node0 cpu1 temp')     plt.subplot(3,1,3)     plt.plot(temp.index, temp.bc_t_node1_cpu0_temp)     plt.xlabel('time')     plt.ylabel('node1 cpu0 temp')      final_path="plots/cd/"     fig.savefig(final_path+filename+'_1.png')     plt.close(fig)     plt.show()


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