How can we group pandas data by a column and sort it in a descending order?

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We can use the groupby() method of pandas to group the data by a particular column and the sort_values() method to sort it in descending order. Here's an example:

import pandas as pd

# create sample data
data = {'fruit': ['apple', 'banana', 'banana', 'apple', 'banana'],
        'count': [2, 3, 1, 4, 2]}

df = pd.DataFrame(data)

# group by 'fruit' column and sum the 'count' values
grouped = df.groupby('fruit').sum()

# sort by 'count' values in descending order
sorted_grouped = grouped.sort_values('count', ascending=False)

print(sorted_grouped)

Output:

        count
fruit        
apple       6
banana      6