plot patch rectangle of range from different rows in pandas

Let’s try plotting one bar after another:

for i,r in df.iterrows():
    plt.barh(r['date'], width=r['end']-r['start'],
             left=r['start'], color='y' if r['cat']=='cat1' else 'g')

Or plot all of them together with mapping the color:

plt.barh(df['date'], width=df['end']-df['start'],
         left=df['start'], color=df['cat'].map({'cat1':'y', 'cat2':'g'}))


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