René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Computing the bounding box of a degenerate polygon throws an error","articleBody":"With 3.3.0, computing the bounding box of a degenerate (one-point) polygon throws an error\r\n\r\n**Code for reproduction**\r\n\r\n```python\r\nfrom matplotlib.patches import Polygon                                                                                                            \r\npp=Polygon([[0.,0.]])                                                                                                                             \r\npp.get_extents()                                                                                                                                  \r\n```\r\n\r\n**Actual outcome**\r\n\r\n```\r\nValueError                                Traceback (most recent call last)\r\n\u003cipython-input-3-1312a177eac2\u003e in \u003cmodule\u003e\r\n----\u003e 1 pp.get_extents()\r\n\r\n/usr/lib/python3.8/site-packages/matplotlib/patches.py in get_extents(self)\r\n    254         Return the `Patch`'s axis-aligned extents as a `~.transforms.Bbox`.\r\n    255         \"\"\"\r\n--\u003e 256         return self.get_path().get_extents(self.get_transform())\r\n    257 \r\n    258     def get_transform(self):\r\n\r\n/usr/lib/python3.8/site-packages/matplotlib/path.py in get_extents(self, transform, **kwargs)\r\n    590             self = transform.transform_path(self)\r\n    591         bbox = Bbox.null()\r\n--\u003e 592         for curve, code in self.iter_bezier(**kwargs):\r\n    593             # places where the derivative is zero can be extrema\r\n    594             _, dzeros = curve.axis_aligned_extrema()\r\n\r\n/usr/lib/python3.8/site-packages/matplotlib/path.py in iter_bezier(self, **kwargs)\r\n    442             if first_vert is None:\r\n    443                 if code != Path.MOVETO:\r\n--\u003e 444                     raise ValueError(\"Malformed path, must start with MOVETO.\")\r\n    445             if code == Path.MOVETO:  # a point is like \"CURVE1\"\r\n    446                 first_vert = verts\r\n\r\nValueError: Malformed path, must start with MOVETO.\r\n```\r\n\r\n**Expected outcome**\r\n\r\nWith 3.2:\r\n```\r\nBbox([[inf, inf], [-inf, -inf]])\r\n```\r\n\r\n**Matplotlib version**\r\n  * Operating system: Linux x86_64\r\n  * Matplotlib version: 3.3.0\r\n  * Matplotlib backend (`print(matplotlib.get_backend())`): Qt5Agg\r\n  * Python version: 3.8.4\r\n","author":{"url":"https://github.com/antonio-rojas","@type":"Person","name":"antonio-rojas"},"datePublished":"2020-07-20T13:08:40.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":5},"url":"https://github.com/17975/matplotlib/issues/17975"}