Facing issue with a Kaggle python exercise

Hi! I'm getting this error for the following Kaggle python exercise... Any thoughts? thanks

/tmp/ipykernel_33/3599585355.py:17: UserWarning: FixedFormatter should only be used together with FixedLocator graph.set_yticklabels(new_labels)

def prettify_graph(graph):

graph.set_title("Results of 500 slot machine pulls")

# Make the y-axis begin at 0

graph.set_ylim(bottom=0)

# Label the y-axis

graph.set_ylabel("Balance")

# Bonus: format the numbers on the y-axis as dollar amounts

# An array of the values displayed on the y-axis (150, 175, 200, etc.)

ticks = graph.get_yticks()

# Format those values into strings beginning with dollar sign

new_labels = ['${}'.format(int(amt)) for amt in ticks]

# Set the new labels

graph.set_yticklabels(new_labels)

graph = jimmy_slots.get_graph()

prettify_graph(graph)

graph

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