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Description
Bug summary
When repeatedly making a plot and saving it with fig.savefig, the number of FontProperties objects keep increasing. This does not occur without the savefig.
Code for reproduction
importgcfromcollectionsimportCounterfrompathlibimportPathimportmatplotlib.pyplotaspltforiinrange(20):fig,ax=plt.subplots()fig.savefig(Path(f"~/test_{i}.png").expanduser())plt.close(fig)gc.collect()object_counts=Counter(f"{type(obj).__module__}.{type(obj).__name__}"forobjingc.get_objects())print(object_counts['matplotlib.font_manager.FontProperties'],end=", ")
Actual outcome
43, 50, 57, 64, 71, 78, 85, 92, 99, 106, 113, 120, 127, 134, 141, 148, 155, 162, 169, 176,
Expected outcome
43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43,
Additional information
rcParams:
`RcParams({'_internal.classic_mode': False, 'agg.path.chunksize': 0, 'animation.bitrate': -1, 'animation.codec': 'h264', 'animation.convert_args': ['-layers', 'OptimizePlus'], 'animation.convert_path': 'convert', 'animation.embed_limit': 20.0, 'animation.ffmpeg_args': [], 'animation.ffmpeg_path': 'ffmpeg', 'animation.frame_format': 'png', 'animation.html': 'none', 'animation.writer': 'ffmpeg', 'axes.autolimit_mode': 'data', 'axes.axisbelow': 'line', 'axes.edgecolor': 'black', 'axes.facecolor': 'white', 'axes.formatter.limits': [-5, 6], 'axes.formatter.min_exponent': 0, 'axes.formatter.offset_threshold': 4, 'axes.formatter.use_locale': False, 'axes.formatter.use_mathtext': False, 'axes.formatter.useoffset': True, 'axes.grid': False, 'axes.grid.axis': 'both', 'axes.grid.which': 'major', 'axes.labelcolor': 'black', 'axes.labelpad': 4.0, 'axes.labelsize': 'medium', 'axes.labelweight': 'normal', 'axes.linewidth': 0.8, 'axes.prop_cycle': cycler('color', ['#1f77b4', '#ff7f0e', '#2ca02c', '#d62728', '#9467bd', '#8c564b', '#e377c2', '#7f7f7f', '#bcbd22', '#17becf']), 'axes.spines.bottom': True, 'axes.spines.left': True, 'axes.spines.right': True, 'axes.spines.top': True, 'axes.titlecolor': 'auto', 'axes.titlelocation': 'center', 'axes.titlepad': 6.0, 'axes.titlesize': 'large', 'axes.titleweight': 'normal', 'axes.titley': None, 'axes.unicode_minus': True, 'axes.xmargin': 0.05, 'axes.ymargin': 0.05, 'axes.zmargin': 0.05, 'axes3d.grid': True, 'axes3d.xaxis.panecolor': (0.95, 0.95, 0.95, 0.5), 'axes3d.yaxis.panecolor': (0.9, 0.9, 0.9, 0.5), 'axes3d.zaxis.panecolor': (0.925, 0.925, 0.925, 0.5), 'backend': 'Qt5Agg', 'backend_fallback': True, 'boxplot.bootstrap': None, 'boxplot.boxprops.color': 'black', 'boxplot.boxprops.linestyle': '-', 'boxplot.boxprops.linewidth': 1.0, 'boxplot.capprops.color': 'black', 'boxplot.capprops.linestyle': '-', 'boxplot.capprops.linewidth': 1.0, 'boxplot.flierprops.color': 'black', 'boxplot.flierprops.linestyle': 'none', 'boxplot.flierprops.linewidth': 1.0, 'boxplot.flierprops.marker': 'o', 'boxplot.flierprops.markeredgecolor': 'black', 'boxplot.flierprops.markeredgewidth': 1.0, 'boxplot.flierprops.markerfacecolor': 'none', 'boxplot.flierprops.markersize': 6.0, 'boxplot.meanline': False, 'boxplot.meanprops.color': 'C2', 'boxplot.meanprops.linestyle': '--', 'boxplot.meanprops.linewidth': 1.0, 'boxplot.meanprops.marker': '^', 'boxplot.meanprops.markeredgecolor': 'C2', 'boxplot.meanprops.markerfacecolor': 'C2', 'boxplot.meanprops.markersize': 6.0, 'boxplot.medianprops.color': 'C1', 'boxplot.medianprops.linestyle': '-', 'boxplot.medianprops.linewidth': 1.0, 'boxplot.notch': False, 'boxplot.patchartist': False, 'boxplot.showbox': True, 'boxplot.showcaps': True, 'boxplot.showfliers': True, 'boxplot.showmeans': False, 'boxplot.vertical': True, 'boxplot.whiskerprops.color': 'black', 'boxplot.whiskerprops.linestyle': '-', 'boxplot.whiskerprops.linewidth': 1.0, 'boxplot.whiskers': 1.5, 'contour.algorithm': 'mpl2014', 'contour.corner_mask': True, 'contour.linewidth': None, 'contour.negative_linestyle': 'dashed', 'date.autoformatter.day': '%Y-%m-%d', 'date.autoformatter.hour': '%m-%d %H', 'date.autoformatter.microsecond': '%M:%S.%f', 'date.autoformatter.minute': '%d %H:%M', 'date.autoformatter.month': '%Y-%m', 'date.autoformatter.second': '%H:%M:%S', 'date.autoformatter.year': '%Y', 'date.converter': 'auto', 'date.epoch': '1970-01-01T00:00:00', 'date.interval_multiples': True, 'docstring.hardcopy': False, 'errorbar.capsize': 0.0, 'figure.autolayout': False, 'figure.constrained_layout.h_pad': 0.04167, 'figure.constrained_layout.hspace': 0.02, 'figure.constrained_layout.use': False, 'figure.constrained_layout.w_pad': 0.04167, 'figure.constrained_layout.wspace': 0.02, 'figure.dpi': 100.0, 'figure.edgecolor': 'white', 'figure.facecolor': 'white', 'figure.figsize': [6.4, 4.8], 'figure.frameon': True, 'figure.hooks': [], 'figure.labelsize': 'large', 'figure.labelweight': 'normal', 'figure.max_open_warning': 20, 'figure.raise_window': True, 'figure.subplot.bottom': 0.11, 'figure.subplot.hspace': 0.2, 'figure.subplot.left': 0.125, 'figure.subplot.right': 0.9, 'figure.subplot.top': 0.88, 'figure.subplot.wspace': 0.2, 'figure.titlesize': 'large', 'figure.titleweight': 'normal', 'font.cursive': ['Apple Chancery', 'Textile', 'Zapf Chancery', 'Sand', 'Script MT', 'Felipa', 'Comic Neue', 'Comic Sans MS', 'cursive'], 'font.family': ['sans-serif'], 'font.fantasy': ['Chicago', 'Charcoal', 'Impact', 'Western', 'xkcd script', 'fantasy'], 'font.monospace': ['DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Computer Modern Typewriter', 'Andale Mono', 'Nimbus Mono L', 'Courier New', 'Courier', 'Fixed', 'Terminal', 'monospace'], 'font.sans-serif': ['DejaVu Sans', 'Bitstream Vera Sans', 'Computer Modern Sans Serif', 'Lucida Grande', 'Verdana', 'Geneva', 'Lucid', 'Arial', 'Helvetica', 'Avant Garde', 'sans-serif'], 'font.serif': ['DejaVu Serif', 'Bitstream Vera Serif', 'Computer Modern Roman', 'New Century Schoolbook', 'Century Schoolbook L', 'Utopia', 'ITC Bookman', 'Bookman', 'Nimbus Roman No9 L', 'Times New Roman', 'Times', 'Palatino', 'Charter', 'serif'], 'font.size': 10.0, 'font.stretch': 'normal', 'font.style': 'normal', 'font.variant': 'normal', 'font.weight': 'normal', 'grid.alpha': 1.0, 'grid.color': '#b0b0b0', 'grid.linestyle': '-', 'grid.linewidth': 0.8, 'hatch.color': 'black', 'hatch.linewidth': 1.0, 'hist.bins': 10, 'image.aspect': 'equal', 'image.cmap': 'viridis', 'image.composite_image': True, 'image.interpolation': 'antialiased', 'image.lut': 256, 'image.origin': 'upper', 'image.resample': True, 'interactive': True, 'keymap.back': ['left', 'c', 'backspace', 'MouseButton.BACK'], 'keymap.copy': ['ctrl+c', 'cmd+c'], 'keymap.forward': ['right', 'v', 'MouseButton.FORWARD'], 'keymap.fullscreen': ['f', 'ctrl+f'], 'keymap.grid': ['g'], 'keymap.grid_minor': ['G'], 'keymap.help': ['f1'], 'keymap.home': ['h', 'r', 'home'], 'keymap.pan': ['p'], 'keymap.quit': ['ctrl+w', 'cmd+w', 'q'], 'keymap.quit_all': [], 'keymap.save': ['s', 'ctrl+s'], 'keymap.xscale': ['k', 'L'], 'keymap.yscale': ['l'], 'keymap.zoom': ['o'], 'legend.borderaxespad': 0.5, 'legend.borderpad': 0.4, 'legend.columnspacing': 2.0, 'legend.edgecolor': '0.8', 'legend.facecolor': 'inherit', 'legend.fancybox': True, 'legend.fontsize': 'medium', 'legend.framealpha': 0.8, 'legend.frameon': True, 'legend.handleheight': 0.7, 'legend.handlelength': 2.0, 'legend.handletextpad': 0.8, 'legend.labelcolor': 'None', 'legend.labelspacing': 0.5, 'legend.loc': 'best', 'legend.markerscale': 1.0, 'legend.numpoints': 1, 'legend.scatterpoints': 1, 'legend.shadow': False, 'legend.title_fontsize': None, 'lines.antialiased': True, 'lines.color': 'C0', 'lines.dash_capstyle': , 'lines.dash_joinstyle': , 'lines.dashdot_pattern': [6.4, 1.6, 1.0, 1.6], 'lines.dashed_pattern': [3.7, 1.6], 'lines.dotted_pattern': [1.0, 1.65], 'lines.linestyle': '-', 'lines.linewidth': 1.5, 'lines.marker': 'None', 'lines.markeredgecolor': 'auto', 'lines.markeredgewidth': 1.0, 'lines.markerfacecolor': 'auto', 'lines.markersize': 6.0, 'lines.scale_dashes': True, 'lines.solid_capstyle': , 'lines.solid_joinstyle': , 'macosx.window_mode': 'system', 'markers.fillstyle': 'full', 'mathtext.bf': 'sans:bold', 'mathtext.bfit': 'sans:italic:bold', 'mathtext.cal': 'cursive', 'mathtext.default': 'it', 'mathtext.fallback': 'cm', 'mathtext.fontset': 'dejavusans', 'mathtext.it': 'sans:italic', 'mathtext.rm': 'sans', 'mathtext.sf': 'sans', 'mathtext.tt': 'monospace', 'patch.antialiased': True, 'patch.edgecolor': 'black', 'patch.facecolor': 'C0', 'patch.force_edgecolor': False, 'patch.linewidth': 1.0, 'path.effects': [], 'path.simplify': True, 'path.simplify_threshold': 0.111111111111, 'path.sketch': None, 'path.snap': True, 'pcolor.shading': 'auto', 'pcolormesh.snap': True, 'pdf.compression': 6, 'pdf.fonttype': 3, 'pdf.inheritcolor': False, 'pdf.use14corefonts': False, 'pgf.preamble': '', 'pgf.rcfonts': True, 'pgf.texsystem': 'xelatex', 'polaraxes.grid': True, 'ps.distiller.res': 6000, 'ps.fonttype': 3, 'ps.papersize': 'letter', 'ps.useafm': False, 'ps.usedistiller': None, 'savefig.bbox': None, 'savefig.directory': '~', 'savefig.dpi': 'figure', 'savefig.edgecolor': 'auto', 'savefig.facecolor': 'auto', 'savefig.format': 'png', 'savefig.orientation': 'portrait', 'savefig.pad_inches': 0.1, 'savefig.transparent': False, 'scatter.edgecolors': 'face', 'scatter.marker': 'o', 'svg.fonttype': 'path', 'svg.hashsalt': None, 'svg.image_inline': True, 'text.antialiased': True, 'text.color': 'black', 'text.hinting': 'force_autohint', 'text.hinting_factor': 8, 'text.kerning_factor': 0, 'text.latex.preamble': '', 'text.parse_math': True, 'text.usetex': False, 'timezone': 'UTC', 'tk.window_focus': False, 'toolbar': 'toolbar2', 'webagg.address': '127.0.0.1', 'webagg.open_in_browser': True, 'webagg.port': 8988, 'webagg.port_retries': 50, 'xaxis.labellocation': 'center', 'xtick.alignment': 'center', 'xtick.bottom': True, 'xtick.color': 'black', 'xtick.direction': 'out', 'xtick.labelbottom': True, 'xtick.labelcolor': 'inherit', 'xtick.labelsize': 'medium', 'xtick.labeltop': False, 'xtick.major.bottom': True, 'xtick.major.pad': 3.5, 'xtick.major.size': 3.5, 'xtick.major.top': True, 'xtick.major.width': 0.8, 'xtick.minor.bottom': True, 'xtick.minor.ndivs': 'auto', 'xtick.minor.pad': 3.4, 'xtick.minor.size': 2.0, 'xtick.minor.top': True, 'xtick.minor.visible': False, 'xtick.minor.width': 0.6, 'xtick.top': False, 'yaxis.labellocation': 'center', 'ytick.alignment': 'center_baseline', 'ytick.color': 'black', 'ytick.direction': 'out', 'ytick.labelcolor': 'inherit', 'ytick.labelleft': True, 'ytick.labelright': False, 'ytick.labelsize': 'medium', 'ytick.left': True, 'ytick.major.left': True, 'ytick.major.pad': 3.5, 'ytick.major.right': True, 'ytick.major.size': 3.5, 'ytick.major.width': 0.8, 'ytick.minor.left': True, 'ytick.minor.ndivs': 'auto', 'ytick.minor.pad': 3.4, 'ytick.minor.right': True, 'ytick.minor.size': 2.0, 'ytick.minor.visible': False, 'ytick.minor.width': 0.6, 'ytick.right': False})`This happens with both the "Qt5Agg" and "Agg" backends.
Operating system
Windows
Matplotlib Version
3.8.4
Matplotlib Backend
Qt5Agg
Python version
3.10.11
Jupyter version
No response
Installation
pip