check labels with handles in ax 1

check labels with handles in ax

handles, labels = ax.get_legend_handles_labels()
ax.legend(handles, labels)

Here is what the above code is Doing:
1. We create a figure and an axis.
2. We plot our line, setting the label for the legend.
3. We get the handles and labels from the axis.
4. We create the legend.

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