Problem

When adding references to examples it is a bit of hassle to open all the files in order to determine which files don't have the references. So I listed them all using this bash command (https://unix.stackexchange.com/a/26839/181419)

find. -type f -name"*.py"| xargs grep -H -c'References'| grep 0$| cut -d':' -f1> references.txt

the 338 examples in need of help are:

animation

• animation/frame_grabbing_sgskip.py
• animation/animate_decay.py
• animation/animated_histogram.py
• animation/rain.py
• animation/dynamic_image.py
• animation/pause_resume.py
• animation/random_walk.py
• animation/simple_anim.py
• animation/unchained.py
• animation/double_pendulum.py
• animation/bayes_update.py
• animation/strip_chart.py
• animation/animation_demo.py

units

• units/radian_demo.py
• units/units_scatter.py
• units/ellipse_with_units.py
• units/bar_demo2.py
• units/annotate_with_units.py
• units/bar_unit_demo.py
• units/units_sample.py
• units/evans_test.py
• units/artist_tests.py
• units/basic_units.py

shapes and collections

• shapes_and_collections/arrow_guide.py

axis artist

• axisartist/simple_axisartist1.py
• axisartist/demo_floating_axes.py
• axisartist/simple_axisline.py
• axisartist/axis_direction.py
• axisartist/demo_floating_axis.py
• axisartist/simple_axisline2.py
• axisartist/demo_ticklabel_alignment.py
• axisartist/simple_axis_direction01.py
• axisartist/simple_axisline3.py
• axisartist/demo_curvelinear_grid2.py
• axisartist/demo_parasite_axes2.py
• axisartist/demo_curvelinear_grid.py
• axisartist/demo_axisline_style.py
• axisartist/demo_axis_direction.py
• axisartist/demo_ticklabel_direction.py
• axisartist/demo_parasite_axes.py
• axisartist/simple_axis_pad.py
• axisartist/simple_axis_direction03.py

frontpage

• frontpage/membrane.py
• frontpage/histogram.py
• frontpage/3D.py
• frontpage/contour.py

widgets

• widgets/menu.py

showcase

• showcase/xkcd.py
• showcase/firefox.py
• showcase/mandelbrot.py
• showcase/integral.py

event handling

• event_handling/poly_editor.py
• event_handling/keypress_demo.py
• event_handling/pick_event_demo2.py
• event_handling/pick_event_demo.py
• event_handling/timers.py
• event_handling/ginput_manual_clabel_sgskip.py
• event_handling/lasso_demo.py
• event_handling/figure_axes_enter_leave.py
• event_handling/data_browser.py
• event_handling/close_event.py
• event_handling/path_editor.py
• event_handling/coords_demo.py
• event_handling/legend_picking.py
• event_handling/viewlims.py
• event_handling/resample.py
• event_handling/zoom_window.py
• event_handling/pipong.py
• event_handling/looking_glass.py
• event_handling/trifinder_event_demo.py
• event_handling/pong_sgskip.py
• event_handling/image_slices_viewer.py

user interfaces

• user_interfaces/embedding_in_gtk3_sgskip.py
• user_interfaces/pylab_with_gtk_sgskip.py
• user_interfaces/embedding_in_wx5_sgskip.py
• user_interfaces/embedding_webagg_sgskip.py
• user_interfaces/embedding_in_wx4_sgskip.py
• user_interfaces/embedding_in_qt_sgskip.py
• user_interfaces/embedding_in_tk_sgskip.py
• user_interfaces/wxcursor_demo_sgskip.py
• user_interfaces/toolmanager_sgskip.py
• user_interfaces/svg_histogram_sgskip.py
• user_interfaces/gtk_spreadsheet_sgskip.py
• user_interfaces/mathtext_wx_sgskip.py
• user_interfaces/web_application_server_sgskip.py
• user_interfaces/embedding_in_wx2_sgskip.py
• user_interfaces/svg_tooltip_sgskip.py
• user_interfaces/embedding_in_gtk3_panzoom_sgskip.py
• user_interfaces/embedding_in_wx3_sgskip.py
• user_interfaces/fourier_demo_wx_sgskip.py
• user_interfaces/mpl_with_glade3_sgskip.py

scales

• scales/aspect_loglog.py
• scales/log_bar.py
• scales/custom_scale.py
• scales/logit_demo.py
• scales/symlog_demo.py
• scales/log_demo.py
• scales/log_test.py

axes grid 1

• axes_grid1/simple_axes_divider3.py
• axes_grid1/simple_axesgrid2.py
• axes_grid1/parasite_simple.py
• axes_grid1/demo_axes_rgb.py
• axes_grid1/demo_axes_grid.py
• axes_grid1/simple_axes_divider1.py
• axes_grid1/demo_fixed_size_axes.py
• axes_grid1/simple_axisline4.py
• axes_grid1/demo_edge_colorbar.py
• axes_grid1/demo_axes_divider.py
• axes_grid1/demo_axes_hbox_divider.py
• axes_grid1/simple_axesgrid.py
• axes_grid1/inset_locator_demo2.py
• axes_grid1/demo_colorbar_of_inset_axes.py
• axes_grid1/demo_colorbar_with_axes_divider.py
• axes_grid1/make_room_for_ylabel_using_axesgrid.py
• axes_grid1/inset_locator_demo.py
• axes_grid1/demo_axes_grid2.py
• axes_grid1/demo_anchored_direction_arrows.py
• axes_grid1/demo_imagegrid_aspect.py
• axes_grid1/simple_colorbar.py
• axes_grid1/simple_anchored_artists.py
• axes_grid1/parasite_simple2.py
• axes_grid1/demo_colorbar_with_inset_locator.py

misc

• misc/customize_rc.py
• misc/packed_bubbles.py
• misc/demo_ribbon_box.py
• misc/tickedstroke_demo.py
• misc/set_and_get.py
• misc/svg_filter_line.py
• misc/custom_projection.py
• misc/logos2.py
• misc/findobj_demo.py
• misc/coords_report.py
• misc/zorder_demo.py
• misc/contour_manual.py
• misc/pythonic_matplotlib.py
• misc/transoffset.py
• misc/multipage_pdf.py
• misc/font_indexing.py
• misc/cursor_demo.py
• misc/fill_spiral.py
• misc/agg_buffer_to_array.py
• misc/load_converter.py
• misc/ftface_props.py
• misc/demo_agg_filter.py
• misc/hyperlinks_sgskip.py
• misc/print_stdout_sgskip.py
• misc/keyword_plotting.py
• misc/agg_buffer.py
• misc/bbox_intersect.py
• misc/table_demo.py
• misc/image_thumbnail_sgskip.py
• misc/patheffect_demo.py
• misc/svg_filter_pie.py
• misc/multiprocess_sgskip.py
• misc/anchored_artists.py

ticks and spines

• ticks_and_spines/date_concise_formatter.py
• ticks_and_spines/auto_ticks.py
• ticks_and_spines/tick_label_right.py
• ticks_and_spines/spines_bounds.py
• ticks_and_spines/centered_spines_with_arrows.py
• ticks_and_spines/date_demo_rrule.py
• ticks_and_spines/date_index_formatter2.py
• ticks_and_spines/tick_xlabel_top.py
• ticks_and_spines/centered_ticklabels.py
• ticks_and_spines/scalarformatter.py
• ticks_and_spines/spine_placement_demo.py
• ticks_and_spines/colorbar_tick_labelling_demo.py
• ticks_and_spines/spines_dropped.py
• ticks_and_spines/date_demo_convert.py
• ticks_and_spines/multiple_yaxis_with_spines.py
• ticks_and_spines/tick-locators.py
• ticks_and_spines/ticklabels_rotation.py
• ticks_and_spines/spines.py

subplots axes and figures

• subplots_axes_and_figures/axes_zoom_effect.py
• subplots_axes_and_figures/gridspec_multicolumn.py
• subplots_axes_and_figures/axis_equal_demo.py
• subplots_axes_and_figures/axhspan_demo.py
• subplots_axes_and_figures/gridspec_nested.py
• subplots_axes_and_figures/subfigures.py
• subplots_axes_and_figures/align_labels_demo.py
• subplots_axes_and_figures/invert_axes.py
• subplots_axes_and_figures/axes_demo.py
• subplots_axes_and_figures/geo_demo.py
• subplots_axes_and_figures/figure_title.py
• subplots_axes_and_figures/colorbar_placement.py
• subplots_axes_and_figures/broken_axis.py
• subplots_axes_and_figures/subplot_toolbar.py
• subplots_axes_and_figures/gridspec_and_subplots.py
• subplots_axes_and_figures/shared_axis_demo.py
• subplots_axes_and_figures/share_axis_lims_views.py
• subplots_axes_and_figures/axis_labels_demo.py
• subplots_axes_and_figures/fahrenheit_celsius_scales.py
• subplots_axes_and_figures/ganged_plots.py
• subplots_axes_and_figures/axes_props.py
• subplots_axes_and_figures/subplots_demo.py
• subplots_axes_and_figures/multiple_figs_demo.py
• subplots_axes_and_figures/subplot_demo.py
• subplots_axes_and_figures/subplot.py
• subplots_axes_and_figures/subplots_adjust.py

mplot3d

• mplot3d/voxels.py
• mplot3d/stem3d_demo.py
• mplot3d/3d_bars.py
• mplot3d/lines3d.py
• mplot3d/voxels_torus.py
• mplot3d/rotate_axes3d_sgskip.py
• mplot3d/tricontourf3d.py
• mplot3d/contour3d_2.py
• mplot3d/quiver3d.py
• mplot3d/contour3d.py
• mplot3d/contourf3d.py
• mplot3d/wire3d_animation_sgskip.py
• mplot3d/scatter3d.py
• mplot3d/errorbar3d.py
• mplot3d/custom_shaded_3d_surface.py
• mplot3d/surface3d_3.py
• mplot3d/text3d.py
• mplot3d/trisurf3d.py
• mplot3d/hist3d.py
• mplot3d/tricontour3d.py
• mplot3d/wire3d_zero_stride.py
• mplot3d/contour3d_3.py
• mplot3d/bars3d.py
• mplot3d/subplot3d.py
• mplot3d/lorenz_attractor.py
• mplot3d/voxels_numpy_logo.py
• mplot3d/wire3d.py
• mplot3d/surface3d_radial.py
• mplot3d/polys3d.py
• mplot3d/offset.py
• mplot3d/surface3d_2.py
• mplot3d/pathpatch3d.py
• mplot3d/trisurf3d_2.py
• mplot3d/voxels_rgb.py
• mplot3d/contourf3d_2.py
• mplot3d/mixed_subplots.py
• mplot3d/2dcollections3d.py

user demo

• userdemo/annotate_simple_coord01.py
• userdemo/pgf_fonts.py
• userdemo/pgf_preamble_sgskip.py
• userdemo/anchored_box01.py
• userdemo/pgf_texsystem.py
• userdemo/demo_gridspec06.py
• userdemo/annotate_text_arrow.py
• userdemo/annotate_simple02.py
• userdemo/simple_legend02.py
• userdemo/annotate_simple03.py
• userdemo/anchored_box04.py
• userdemo/demo_gridspec03.py
• userdemo/colormap_normalizations.py
• userdemo/colormap_normalizations_symlognorm.py
• userdemo/annotate_simple01.py
• userdemo/anchored_box02.py
• userdemo/demo_gridspec01.py
• userdemo/annotate_simple04.py
• userdemo/simple_annotate01.py
• userdemo/simple_legend01.py
• userdemo/annotate_simple_coord02.py
• userdemo/anchored_box03.py
• userdemo/annotate_simple_coord03.py
• userdemo/annotate_explain.py
• userdemo/custom_boxstyle01.py
• userdemo/connect_simple01.py

lines bars and markers

• lines_bars_and_markers/vline_hline_demo.py
• lines_bars_and_markers/eventcollection_demo.py
• lines_bars_and_markers/scatter_demo2.py
• lines_bars_and_markers/psd_demo.py
• lines_bars_and_markers/scatter_custom_symbol.py
• lines_bars_and_markers/line_demo_dash_control.py
• lines_bars_and_markers/markevery_demo.py
• lines_bars_and_markers/barh.py
• lines_bars_and_markers/fill_between_alpha.py
• lines_bars_and_markers/masked_demo.py
• lines_bars_and_markers/multicolored_line.py
• lines_bars_and_markers/cohere.py
• lines_bars_and_markers/lines_with_ticks_demo.py
• lines_bars_and_markers/marker_reference.py
• lines_bars_and_markers/stackplot_demo.py
• lines_bars_and_markers/scatter_star_poly.py
• lines_bars_and_markers/spectrum_demo.py
• lines_bars_and_markers/csd_demo.py
• lines_bars_and_markers/errorbar_subsample.py
• lines_bars_and_markers/eventplot_demo.py
• lines_bars_and_markers/linestyles.py
• lines_bars_and_markers/scatter_symbol.py
• lines_bars_and_markers/gradient_bar.py
• lines_bars_and_markers/fill_betweenx_demo.py
• lines_bars_and_markers/bar_stacked.py
• lines_bars_and_markers/markevery_prop_cycle.py
• lines_bars_and_markers/categorical_variables.py
• lines_bars_and_markers/scatter_masked.py
• lines_bars_and_markers/broken_barh.py

text labels and annotations

• text_labels_and_annotations/text_rotation_relative_to_line.py
• text_labels_and_annotations/usetex_baseline_test.py
• text_labels_and_annotations/arrow_simple_demo.py
• text_labels_and_annotations/usetex_fonteffects.py
• text_labels_and_annotations/font_family_rc_sgskip.py
• text_labels_and_annotations/custom_legends.py
• text_labels_and_annotations/rainbow_text.py
• text_labels_and_annotations/mathtext_demo.py
• text_labels_and_annotations/demo_text_path.py
• text_labels_and_annotations/placing_text_boxes.py
• text_labels_and_annotations/fonts_demo.py
• text_labels_and_annotations/multiline.py
• text_labels_and_annotations/autowrap.py
• text_labels_and_annotations/mathtext_fontfamily_example.py
• text_labels_and_annotations/text_rotation.py
• text_labels_and_annotations/annotation_demo.py
• text_labels_and_annotations/titles_demo.py
• text_labels_and_annotations/engineering_formatter.py
• text_labels_and_annotations/mathtext_examples.py
• text_labels_and_annotations/dfrac_demo.py
• text_labels_and_annotations/stix_fonts_demo.py
• text_labels_and_annotations/date.py
• text_labels_and_annotations/fonts_demo_kw.py
• text_labels_and_annotations/figlegend_demo.py
• text_labels_and_annotations/accented_text.py
• text_labels_and_annotations/unicode_minus.py
• text_labels_and_annotations/font_table.py
• text_labels_and_annotations/tex_demo.py
• text_labels_and_annotations/text_alignment.py
• text_labels_and_annotations/legend_demo.py
• text_labels_and_annotations/arrow_demo.py
• text_labels_and_annotations/fancytextbox_demo.py
• text_labels_and_annotations/text_fontdict.py

speciality plots

• specialty_plots/mri_demo.py
• specialty_plots/mri_with_eeg.py
• specialty_plots/hinton_demo.py
• specialty_plots/topographic_hillshading.py
• specialty_plots/advanced_hillshading.py

style sheets

• style_sheets/ggplot.py
• style_sheets/grayscale.py
• style_sheets/style_sheets_reference.py
• style_sheets/fivethirtyeight.py
• style_sheets/plot_solarizedlight2.py
• style_sheets/bmh.py
• style_sheets/dark_background.py

images and contours

• images_contours_and_fields/image_nonuniform.py
• images_contours_and_fields/contours_in_optimization_demo.py