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In the below we retrieve population data from the World Bank using the wbdata python package
import pandas as pd
import wbdata as wb
pd.options.display.max_rows = 6
pd.options.display.max_columns = 20
Corresponding indicator is found using search method - or, directly, the World Bank site.
wb.search_indicators('Population, total') # SP.POP.TOTL
# wb.search_indicators('area')
# => https://data.worldbank.org/indicator is easier to use
Now we download the population data
indicators = {'SP.POP.TOTL': 'Population, total',
'AG.SRF.TOTL.K2': 'Surface area (sq. km)',
'AG.LND.TOTL.K2': 'Land area (sq. km)',
'AG.LND.ARBL.ZS': 'Arable land (% of land area)'}
data = wb.get_dataframe(indicators, convert_date=True).sort_index()
data
World is one of the countries
data.loc['World']
Can we classify over continents?
data.loc[(slice(None), '2017-01-01'), :]['Population, total'].dropna(
).sort_values().tail(60).index.get_level_values('country')
Extract zones manually (in order of increasing population)
zones = ['North America', 'Middle East & North Africa',
'Latin America & Caribbean', 'Europe & Central Asia',
'Sub-Saharan Africa', 'South Asia',
'East Asia & Pacific'][::-1]
And extract population information (and check total is right)
population = data.loc[zones]['Population, total'].swaplevel().unstack()
population = population[zones]
assert all(data.loc['World']['Population, total'] == population.sum(axis=1))
import matplotlib.pyplot as plt
plt.clf()
plt.figure(figsize=(10, 5), dpi=100)
plt.stackplot(population.index, population.values.T / 1e9)
plt.legend(population.columns, loc='upper left')
plt.ylabel('Population count (B)')
plt.show()
+++
Stacked area plots (with cumulated values computed depending on selected legends) are on their way at Plotly. For now we just do a stacked bar plot.
import plotly.offline as offline
import plotly.graph_objs as go
offline.init_notebook_mode()
bars = [go.Bar(x=population.index, y=population[zone], name=zone)
for zone in zones]
fig = go.Figure(data=bars,
layout=go.Layout(title='World population',
barmode='stack'))
offline.iplot(fig)