Provides IntelliSense better for Python 3.12

[ydmykr]

This is an issue related on StackOverflow.

import matplotlib.pyplot as plt

fig, ax = plt.subplots()

fruits = ['apple', 'blueberry', 'cherry', 'orange']
counts = [40, 100, 30, 55]
colours = ['red', 'blue', 'red', 'orange']

ax.bar(fruits, counts, label=colours, color=colours)

ax.set_ylabel('fruit supply')
ax.set_title('Fruit supply by kind and color')
ax.legend(title='Fruit color')

plt.show()

For the same code, if I use python 3.11, type the dot after ax and I get the intellisense, but switching to 3.12 doesn't.

[lcdunne]

Not sure if my issue is related but I recently downloaded VSCode and I am having intellisense problems too, only I'm using Python 3.11.2. I have the Python extension, but disabling Pylance makes the intellisense work better (so I guess Jedi is ok but Pylance is not?). I wonder if this issue relates to Pylance?

[tomvothecoder]

Not sure if my issue is related but I recently downloaded VSCode and I am having intellisense problems too, only I'm using Python 3.11.2. I have the Python extension, but disabling Pylance makes the intellisense work better (so I guess Jedi is ok but Pylance is not?). I wonder if this issue relates to Pylance?

I also just started having Intellisense problems today after it was working fine last week. I think this has to do with a bug in Pylance v2023.10.40 and v2023.10.50 (#5055 and #5019), which we both released recently.

I downgraded to Pylance v2023.10.30 and Intellisense is working again.

[debonte]

I don't see Intellisense after ax. in either version of Python. The reason is that plt.subplots in matplotlib 3.8.0 returns tuple[Figure, Any], so Pylance doesn't know the type of ax. Matplotlib 3.8.0 added inline types which Pylance trusts because the lib is py.typed.

Maybe the original poster on StackOverflow was using different matplotlib versions in addition to different Python versions? If I install matplotlib 3.7.3 instead of 3.8.0, then Pylance uses its bundled matplotlib stubs and treats ax as an Axes object.

[dlefcoe]

I am the original posted and confirm that i am using version 3.8.0
I did not try earlier versions and would be averse to roling back versions.

[debonte]

I am the original posted and confirm that i am using version 3.8.0
I did not try earlier versions and would be averse to roling back versions.

Ok. Please file an issue on matplotlib at https://github.com/matplotlib/matplotlib/issues. Pylance is behaving correctly here given the current tuple[Figure, Any] return type annotation in matplotlib 3.8.0.