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import matplotlib.pyplot as plt
import pandas as pd

def draw_boxplot_numerical_categorical_cols(df, numerical_col, categorical_col):
    categories = []
    for category in df[categorical_col].unique():
        categories.append({
                'categorical_col': category,
                'numerical_col': df[df[categorical_col] == category][numerical_col]})
        
    
    plt.figure(figsize=(10, 8))
    plt.boxplot([e['numerical_col'] for e in categories], labels=[e['categorical_col'] for e in categories]);