示例1：带样式的柱状图
python
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import numpy as np
import pandas as pd
import matplotlib.pyplot as plt# 生成数据
df = pd.DataFrame(np.random.randint(10, 100, size=(8, 4)),columns=['Spring', 'Summer', 'Autumn', 'Winter'],index=[2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022]
)# 绘制带样式的柱状图
ax = df.plot.bar(figsize=(12, 6),color=['#4CAF50', '#2196F3', '#FF9800', '#9C27B0'],edgecolor='black',width=0.8
)# 设置图表元素
plt.title('Seasonal Sales Trends (2015-2022)', fontsize=14, pad=20)
plt.xlabel('Year', labelpad=15)
plt.ylabel('Sales (Million USD)', labelpad&#
)
)
