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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Marker kwarg in grid raise exception","articleBody":"**Description**\r\n\r\nUsing marker kwarg in grid raise a exception\r\n\r\n**Version used**\r\n\r\npython 3.11.2,  really I found this bug same time ago using 3.9 or so\r\nmatplotlib 3.6.3\r\nAlthough the error names Tkinter, the error is also reproduced with qt backend\r\n\r\n**Code to reproduce**\r\n\r\n```\r\nfrom matplotlib import pyplot\r\n\r\nx = [0, 1]\r\ny = [0, 1]\r\npyplot.plot(x, y)\r\npyplot.grid(True, marker=\"o\")\r\npyplot.show()\r\n```\r\nAnd the exception raised...\r\n\r\n```\r\njjgomera@msi:~/Programacion/pychemqt$ python3 bug.py \r\nException in Tkinter callback\r\nTraceback (most recent call last):\r\n  File \"/usr/lib/python3.11/tkinter/__init__.py\", line 1948, in __call__\r\n    return self.func(*args)\r\n           ^^^^^^^^^^^^^^^^\r\n  File \"/usr/lib/python3.11/tkinter/__init__.py\", line 861, in callit\r\n    func(*args)\r\n  File \"/usr/lib/python3/dist-packages/matplotlib/backends/_backend_tk.py\", line 251, in idle_draw\r\n    self.draw()\r\n  File \"/usr/lib/python3/dist-packages/matplotlib/backends/backend_tkagg.py\", line 10, in draw\r\n    super().draw()\r\n  File \"/usr/lib/python3/dist-packages/matplotlib/backends/backend_agg.py\", line 405, in draw\r\n    self.figure.draw(self.renderer)\r\n  File \"/usr/lib/python3/dist-packages/matplotlib/artist.py\", line 74, in draw_wrapper\r\n    result = draw(artist, renderer, *args, **kwargs)\r\n             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\r\n  File \"/usr/lib/python3/dist-packages/matplotlib/artist.py\", line 51, in draw_wrapper\r\n    return draw(artist, renderer)\r\n           ^^^^^^^^^^^^^^^^^^^^^^\r\n  File \"/usr/lib/python3/dist-packages/matplotlib/figure.py\", line 3082, in draw\r\n    mimage._draw_list_compositing_images(\r\n  File \"/usr/lib/python3/dist-packages/matplotlib/image.py\", line 131, in _draw_list_compositing_images\r\n    a.draw(renderer)\r\n  File \"/usr/lib/python3/dist-packages/matplotlib/artist.py\", line 51, in draw_wrapper\r\n    return draw(artist, renderer)\r\n           ^^^^^^^^^^^^^^^^^^^^^^\r\n  File \"/usr/lib/python3/dist-packages/matplotlib/axes/_base.py\", line 3100, in draw\r\n    mimage._draw_list_compositing_images(\r\n  File \"/usr/lib/python3/dist-packages/matplotlib/image.py\", line 131, in _draw_list_compositing_images\r\n    a.draw(renderer)\r\n  File \"/usr/lib/python3/dist-packages/matplotlib/artist.py\", line 51, in draw_wrapper\r\n    return draw(artist, renderer)\r\n           ^^^^^^^^^^^^^^^^^^^^^^\r\n  File \"/usr/lib/python3/dist-packages/matplotlib/axis.py\", line 1304, in draw\r\n    ticks_to_draw = self._update_ticks()\r\n                    ^^^^^^^^^^^^^^^^^^^^\r\n  File \"/usr/lib/python3/dist-packages/matplotlib/axis.py\", line 1192, in _update_ticks\r\n    major_ticks = self.get_major_ticks(len(major_locs))\r\n                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\r\n  File \"/usr/lib/python3/dist-packages/matplotlib/axis.py\", line 1534, in get_major_ticks\r\n    tick = self._get_tick(major=True)\r\n           ^^^^^^^^^^^^^^^^^^^^^^^^^^\r\n  File \"/usr/lib/python3/dist-packages/matplotlib/axis.py\", line 1483, in _get_tick\r\n    return self._tick_class(self.axes, 0, major=major, **tick_kw)\r\n           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\r\n  File \"/usr/lib/python3/dist-packages/matplotlib/axis.py\", line 422, in __init__\r\n    super().__init__(*args, **kwargs)\r\n  File \"/usr/lib/python3/dist-packages/matplotlib/axis.py\", line 166, in __init__\r\n    self.gridline = mlines.Line2D(\r\n                    ^^^^^^^^^^^^^^\r\nTypeError: matplotlib.lines.Line2D() got multiple values for keyword argument 'marker'\r\n\r\n\r\n```","author":{"url":"https://github.com/jjgomera","@type":"Person","name":"jjgomera"},"datePublished":"2023-05-18T18:10:25.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":6},"url":"https://github.com/25910/matplotlib/issues/25910"}