import matplotlib.pyplot as plt
data = {'Category A': 10, 'Category B': 25, 'Category C': 15, 'Category D': 30}
categories = list(data.keys())
values = list(data.values())
plt.bar(categories, values, color='skyblue')
plt.xlabel('Categories')
plt.ylabel('Values')
plt.title('Sample Bar Chart in Python')
plt.show()
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