# Sorting Pandas Dataframe in Descending Order
# importing pandas library
import pandas as pd
# Initializing the nested list with Data set
age_list = [['Afghanistan', 1952, 8425333, 'Asia'],
['Australia', 1957, 9712569, 'Oceania'],
['Brazil', 1962, 76039390, 'Americas'],
['China', 1957, 637408000, 'Asia'],
['France', 1957, 44310863, 'Europe'],
['India', 1952, 3.72e+08, 'Asia'],
['United States', 1957, 171984000, 'Americas']]
# creating a pandas dataframe
df = pd.DataFrame(age_list, columns=['Country', 'Year',
'Population', 'Continent'])
# Sorting by column "Population"
df.sort_values(by=['Population'], ascending=False)