<|user|>
Read shampoo sales data and plot a line chart chart for each month.<|end|>
<|assistant|>
```python
import pandas as pd
import matplotlib.pyplot as plt

df = pd.read_csv("D:\Python\Articles\matplotlib\sales_data.csv")
monthList = df['month_number'].tolist()
salesData = df['shampoo'].tolist()
plt.plot(monthList, salesData, label='shampoo Sales data', marker='o')
plt.xlabel('Month Number')
plt.ylabel('Number of units Sold')
plt.legend(loc='upper left')
plt.title('shampoo Sales data')
plt.xticks(monthList)
plt.grid(True, linewidth=1, linestyle="--")
plt.show()
```<|end|>
