Course Lab Error

sanjeevsondur · January 19, 2026, 2:56pm

Course: Mathematics for machine learning and data science

Week 3 Lab: C1W3_UGL_1_vector_operations

Errors while running above lab: (cell 2 , under visualization)

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
File ~\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.13_qbz5n2kfra8p0\LocalCache\local-packages\Python313\site-packages\IPython\core\formatters.py:402, in BaseFormatter.__call__(self, obj)
    400     pass
    401 else:
--> 402     return printer(obj)
    403 # Finally look for special method names
    404 method = get_real_method(obj, self.print_method)

File ~\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.13_qbz5n2kfra8p0\LocalCache\local-packages\Python313\site-packages\IPython\core\pylabtools.py:170, in print_figure(fig, fmt, bbox_inches, base64, **kwargs)
    167     from matplotlib.backend_bases import FigureCanvasBase
    168     FigureCanvasBase(fig)
--> 170 fig.canvas.print_figure(bytes_io, **kw)
    171 data = bytes_io.getvalue()
    172 if fmt == 'svg':

File ~\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.13_qbz5n2kfra8p0\LocalCache\local-packages\Python313\site-packages\matplotlib\backend_bases.py:2157, in FigureCanvasBase.print_figure(self, filename, dpi, facecolor, edgecolor, orientation, format, bbox_inches, pad_inches, bbox_extra_artists, backend, **kwargs)
   2154     # we do this instead of `self.figure.draw_without_rendering`
   2155     # so that we can inject the orientation
   2156     with getattr(renderer, "_draw_disabled", nullcontext)():
-> 2157         self.figure.draw(renderer)
   2158 if bbox_inches:
   2159     if bbox_inches == "tight":

File ~\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.13_qbz5n2kfra8p0\LocalCache\local-packages\Python313\site-packages\matplotlib\artist.py:94, in _finalize_rasterization.<locals>.draw_wrapper(artist, renderer, *args, **kwargs)
     92 @wraps(draw)
     93 def draw_wrapper(artist, renderer, *args, **kwargs):
---> 94     result = draw(artist, renderer, *args, **kwargs)
     95     if renderer._rasterizing:
     96         renderer.stop_rasterizing()

File ~\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.13_qbz5n2kfra8p0\LocalCache\local-packages\Python313\site-packages\matplotlib\artist.py:71, in allow_rasterization.<locals>.draw_wrapper(artist, renderer)
     68     if artist.get_agg_filter() is not None:
     69         renderer.start_filter()
---> 71     return draw(artist, renderer)
     72 finally:
     73     if artist.get_agg_filter() is not None:

File ~\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.13_qbz5n2kfra8p0\LocalCache\local-packages\Python313\site-packages\matplotlib\figure.py:3257, in Figure.draw(self, renderer)
   3254             # ValueError can occur when resizing a window.
   3256     self.patch.draw(renderer)
-> 3257     mimage._draw_list_compositing_images(
   3258         renderer, self, artists, self.suppressComposite)
   3260     renderer.close_group('figure')
   3261 finally:

File ~\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.13_qbz5n2kfra8p0\LocalCache\local-packages\Python313\site-packages\matplotlib\image.py:134, in _draw_list_compositing_images(renderer, parent, artists, suppress_composite)
    132 if not_composite or not has_images:
    133     for a in artists:
--> 134         a.draw(renderer)
    135 else:
    136     # Composite any adjacent images together
    137     image_group = []

File ~\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.13_qbz5n2kfra8p0\LocalCache\local-packages\Python313\site-packages\matplotlib\artist.py:71, in allow_rasterization.<locals>.draw_wrapper(artist, renderer)
     68     if artist.get_agg_filter() is not None:
     69         renderer.start_filter()
---> 71     return draw(artist, renderer)
     72 finally:
     73     if artist.get_agg_filter() is not None:

File ~\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.13_qbz5n2kfra8p0\LocalCache\local-packages\Python313\site-packages\matplotlib\axes\_base.py:3226, in _AxesBase.draw(self, renderer)
   3223 if artists_rasterized:
   3224     _draw_rasterized(self.get_figure(root=True), artists_rasterized, renderer)
-> 3226 mimage._draw_list_compositing_images(
   3227     renderer, self, artists, self.get_figure(root=True).suppressComposite)
   3229 renderer.close_group('axes')
   3230 self.stale = False

File ~\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.13_qbz5n2kfra8p0\LocalCache\local-packages\Python313\site-packages\matplotlib\image.py:134, in _draw_list_compositing_images(renderer, parent, artists, suppress_composite)
    132 if not_composite or not has_images:
    133     for a in artists:
--> 134         a.draw(renderer)
    135 else:
    136     # Composite any adjacent images together
    137     image_group = []

File ~\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.13_qbz5n2kfra8p0\LocalCache\local-packages\Python313\site-packages\matplotlib\artist.py:71, in allow_rasterization.<locals>.draw_wrapper(artist, renderer)
     68     if artist.get_agg_filter() is not None:
     69         renderer.start_filter()
---> 71     return draw(artist, renderer)
     72 finally:
     73     if artist.get_agg_filter() is not None:

File ~\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.13_qbz5n2kfra8p0\LocalCache\local-packages\Python313\site-packages\matplotlib\text.py:762, in Text.draw(self, renderer)
    760 if np.ma.is_masked(y):
    761     y = np.nan
--> 762 posx = float(self.convert_xunits(x))
    763 posy = float(self.convert_yunits(y))
    764 posx, posy = trans.transform((posx, posy))

TypeError: only 0-dimensional arrays can be converted to Python scalars

Also next cell error: Under Scalar Multiplication

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
File ~\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.13_qbz5n2kfra8p0\LocalCache\local-packages\Python313\site-packages\IPython\core\formatters.py:402, in BaseFormatter.__call__(self, obj)
    400     pass
    401 else:
--> 402     return printer(obj)
    403 # Finally look for special method names
    404 method = get_real_method(obj, self.print_method)

File ~\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.13_qbz5n2kfra8p0\LocalCache\local-packages\Python313\site-packages\IPython\core\pylabtools.py:170, in print_figure(fig, fmt, bbox_inches, base64, **kwargs)
    167     from matplotlib.backend_bases import FigureCanvasBase
    168     FigureCanvasBase(fig)
--> 170 fig.canvas.print_figure(bytes_io, **kw)
    171 data = bytes_io.getvalue()
    172 if fmt == 'svg':

File ~\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.13_qbz5n2kfra8p0\LocalCache\local-packages\Python313\site-packages\matplotlib\backend_bases.py:2157, in FigureCanvasBase.print_figure(self, filename, dpi, facecolor, edgecolor, orientation, format, bbox_inches, pad_inches, bbox_extra_artists, backend, **kwargs)
   2154     # we do this instead of `self.figure.draw_without_rendering`
   2155     # so that we can inject the orientation
   2156     with getattr(renderer, "_draw_disabled", nullcontext)():
-> 2157         self.figure.draw(renderer)
   2158 if bbox_inches:
   2159     if bbox_inches == "tight":

File ~\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.13_qbz5n2kfra8p0\LocalCache\local-packages\Python313\site-packages\matplotlib\artist.py:94, in _finalize_rasterization.<locals>.draw_wrapper(artist, renderer, *args, **kwargs)
     92 @wraps(draw)
     93 def draw_wrapper(artist, renderer, *args, **kwargs):
---> 94     result = draw(artist, renderer, *args, **kwargs)
     95     if renderer._rasterizing:
     96         renderer.stop_rasterizing()

File ~\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.13_qbz5n2kfra8p0\LocalCache\local-packages\Python313\site-packages\matplotlib\artist.py:71, in allow_rasterization.<locals>.draw_wrapper(artist, renderer)
     68     if artist.get_agg_filter() is not None:
     69         renderer.start_filter()
---> 71     return draw(artist, renderer)
     72 finally:
     73     if artist.get_agg_filter() is not None:

File ~\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.13_qbz5n2kfra8p0\LocalCache\local-packages\Python313\site-packages\matplotlib\figure.py:3257, in Figure.draw(self, renderer)
   3254             # ValueError can occur when resizing a window.
   3256     self.patch.draw(renderer)
-> 3257     mimage._draw_list_compositing_images(
   3258         renderer, self, artists, self.suppressComposite)
   3260     renderer.close_group('figure')
   3261 finally:

File ~\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.13_qbz5n2kfra8p0\LocalCache\local-packages\Python313\site-packages\matplotlib\image.py:134, in _draw_list_compositing_images(renderer, parent, artists, suppress_composite)
    132 if not_composite or not has_images:
    133     for a in artists:
--> 134         a.draw(renderer)
    135 else:
    136     # Composite any adjacent images together
    137     image_group = []

File ~\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.13_qbz5n2kfra8p0\LocalCache\local-packages\Python313\site-packages\matplotlib\artist.py:71, in allow_rasterization.<locals>.draw_wrapper(artist, renderer)
     68     if artist.get_agg_filter() is not None:
     69         renderer.start_filter()
---> 71     return draw(artist, renderer)
     72 finally:
     73     if artist.get_agg_filter() is not None:

File ~\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.13_qbz5n2kfra8p0\LocalCache\local-packages\Python313\site-packages\matplotlib\axes\_base.py:3226, in _AxesBase.draw(self, renderer)
   3223 if artists_rasterized:
   3224     _draw_rasterized(self.get_figure(root=True), artists_rasterized, renderer)
-> 3226 mimage._draw_list_compositing_images(
   3227     renderer, self, artists, self.get_figure(root=True).suppressComposite)
   3229 renderer.close_group('axes')
   3230 self.stale = False

File ~\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.13_qbz5n2kfra8p0\LocalCache\local-packages\Python313\site-packages\matplotlib\image.py:134, in _draw_list_compositing_images(renderer, parent, artists, suppress_composite)
    132 if not_composite or not has_images:
    133     for a in artists:
--> 134         a.draw(renderer)
    135 else:
    136     # Composite any adjacent images together
    137     image_group = []

File ~\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.13_qbz5n2kfra8p0\LocalCache\local-packages\Python313\site-packages\matplotlib\artist.py:71, in allow_rasterization.<locals>.draw_wrapper(artist, renderer)
     68     if artist.get_agg_filter() is not None:
     69         renderer.start_filter()
---> 71     return draw(artist, renderer)
     72 finally:
     73     if artist.get_agg_filter() is not None:

File ~\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.13_qbz5n2kfra8p0\LocalCache\local-packages\Python313\site-packages\matplotlib\text.py:762, in Text.draw(self, renderer)
    760 if np.ma.is_masked(y):
    761     y = np.nan
--> 762 posx = float(self.convert_xunits(x))
    763 posy = float(self.convert_yunits(y))
    764 posx, posy = trans.transform((posx, posy))

TypeError: only 0-dimensional arrays can be converted to Python scalars

paulinpaloalto · January 22, 2026, 2:54am

I just did “Cell -> Run All” in that Lab notebook and I don’t see any problems. Are you running this on the Coursera website or on your local computer or someplace else? Note that it doesn’t necessarily “just work” if you download it and run it in a different environment.

sanjeevsondur · January 22, 2026, 3:30am

On my local computer.. what other lib package do I need

TMosh · January 22, 2026, 3:45am

Running the assignments on your local computer is quite a challenge. You need all of the assignment files, and you need to install exactly the same versions of all of the tools that Coursera provided when the course was first created.

paulinpaloalto · January 22, 2026, 4:22am

Yes, as Tom says, those are deep waters. There are no official instructions because there are too many choices: how many different versions of Windows, MacOS, Linux are there at this point?

Here’s a thread with some guidance to get started down that path. But it’s way easier just to run it on the course website.

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Course Lab Error

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