Plt.legend() isn't working

Python Help
1

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Hello, I’m a biology PhD student learning Python. I just started using matplotlib to make figures, and I can’t seem to figure out why legends don’t show up.
Here’s the script. Can anyone point out why?
PS: I’m also open to IDE suggestions. Somehow VS code isn’t working properly on my laptop and I’m not sure how good Spyder is. Thank you!

2

You have to provide arguments to the plt.legend() call. Add your labels and colors to a list as the for loop runs, then pass that to legend() as the handles. Something like:

import matplotlib.patches as mpatches
patches = []
for country in gas:
    (...)
    patches.append(mpatches.Patch(color=<color>, label=country)) # assign the color to each line

plt.legend(handles=patches, loc='upper right')

https://matplotlib.org/stable/api/_as_gen/matplotlib.pyplot.legend.html