Create app.py

app.py

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+# Import necessary libraries
+import pandas as pd
+import matplotlib.pyplot as plt
+
+# Create a dictionary of states with their region, population, and area
+states = {
+    'Alabama': {'region': 'South', 'population': 4903185, 'area': 135767},
+    'Alaska': {'region': 'West', 'population': 731545, 'area': 1723337},
+    'Arizona': {'region': 'West', 'population': 7278717, 'area': 295234},
+    'Arkansas': {'region': 'South', 'population': 3017804, 'area': 137732},
+    'California': {'region': 'West', 'population': 39538223, 'area': 423967},
+    'Colorado': {'region': 'West', 'population': 5773714, 'area': 269601},
+    'Connecticut': {'region': 'Northeast', 'population': 3605944, 'area': 14357},
+    'Delaware': {'region': 'South', 'population': 989948, 'area': 6446},
+    'Florida': {'region': 'South', 'population': 21538187, 'area': 170312},
+    'Georgia': {'region': 'South', 'population': 10711908, 'area': 153910},
+    'Hawaii': {'region': 'West', 'population': 1415872, 'area': 28314},
+    'Idaho': {'region': 'West', 'population': 1826156, 'area': 216443},
+    'Illinois': {'region': 'Midwest', 'population': 12671821, 'area': 149995},
+    'Indiana': {'region': 'Midwest', 'population': 6732219, 'area': 94326},
+    'Iowa': {'region': 'Midwest', 'population': 3155070, 'area': 145746},
+    'Kansas': {'region': 'Midwest', 'population': 2913314, 'area': 213099},
+    'Kentucky': {'region': 'South', 'population': 4467673, 'area': 104656},
+    'Louisiana': {'region': 'South', 'population': 4648794, 'area': 135659},
+    'Maine': {'region': 'Northeast', 'population': 1362359, 'area': 91634},
+    'Maryland': {'region': 'South', 'population': 6177224, 'area': 32131},
+    'Massachusetts': {'region': 'Northeast', 'population': 7029917, 'area': 27336},
+    'Michigan': {'region': 'Midwest', 'population': 10077331, 'area': 250487},
+    'Minnesota': {'region': 'Midwest', 'population': 5706494, 'area': 225163},
+    'Mississippi': {'region': 'South', 'population': 2989260, 'area': 125438},
+    'Missouri': {'region': 'Midwest', 'population': 6169270, 'area': 180540},
+    'Montana': {'region': 'West', 'population': 1084225, 'area': 380831},
+    'Nebraska': {'region': 'Midwest', 'population': 1952570, 'area': 200330},
+    'Nevada': {'region': 'West', 'population': 3139658, 'area': 286380},
+    'New Hampshire': {'region': 'Northeast', 'population': 1371246, 'area': 24214},
+    'New Jersey': {'region': 'Northeast', 'population': 9288994, 'area': 22591},
+    'New Mexico': {'region': 'West', 'population': 2117522, 'area': 314917},
+    'New York': {'region': 'Northeast', 'population': 20215751, 'area': 141297},
+    'North Carolina': {'region': 'South', 'population': 10488084, 'area': 139391},
+    'North Dakota': {'region': 'Midwest', 'population': 762062, 'area': 183108},
+    'Ohio': {'region': 'Midwest', 'population': 11689100, 'area': 116098},
+    'Oklahoma': {'region': 'South', 'population': 3953823, 'area': 181037},
+    'Oregon': {'region': 'West', 'population': 4217737, 'area': 254799},
+    'Pennsylvania': {'region': 'Northeast', 'population': 12801989, 'area': 119280},
+    'Rhode Island': {'region': 'Northeast', 'population': 1097379, 'area': 4001},
+    'South Carolina': {'region': 'South', 'population': 5148714, 'area': 82933},
+    'South Dakota': {'region': 'Midwest', 'population': 884659, 'area': 199729},
+    'Tennessee': {'region': 'South', 'population': 6833174, 'area': 109153},
+    'Texas': {'region': 'South', 'population': 29145505, 'area': 695662},
+    'Utah': {'region': 'West', 'population': 3271616, 'area': 219882},
+    'Vermont': {'region': 'Northeast', 'population': 623989, 'area': 24906},
+    'Virginia': {'region': 'South', 'population': 8631393, 'area': 110787},
+    'Washington': {'region': 'West', 'population': 7693612, 'area': 184661},
+    'West Virginia': {'region': 'South', 'population': 1792147, 'area': 62756},
+    'Wisconsin': {'region': 'Midwest', 'population': 5851754, 'area': 169635},
+    'Wyoming': {'region': 'West', 'population': 578759, 'area': 253335}
+}
+
+# Create a function to calculate population density
+def calculate_density(population, area):
+    return population / area
+
+# Create a function to plot the graph
+def plot_graph(df, region):
+    plt.figure(figsize=(10, 5))
+    plt.bar(df.index, df['Population Density'])
+    plt.title(f'Population Density of States in {region} Region')
+    plt.xlabel('State')
+    plt.ylabel('Population Density')
+    plt.xticks(rotation=90)
+    plt.show()
+
+# Group states by region and calculate the total population and area for each region
+regions = {}
+for state, data in states.items():
+    region = data['region']
+    population = data['population']
+    area = data['area']
+    if region not in regions:
+        regions[region] = {'population': population, 'area': area, 'states': []}
+    else:
+        regions[region]['population'] += population
+        regions[region]['area'] += area
+    regions[region]['states'].append(state)
+
+# Calculate the population density for each state in each region
+for region, data in regions.items():
+    population = data['population']
+    area = data['area']
+    states = data['states']
+    density = []
+    for state in states:
+        state_population = states[state]['population']
+        state_area = states[state]['area']
+        state_density = calculate_density(state_population, state_area)
+        density.append(state_density)
+    df = pd.DataFrame({'State': states, 'Population Density': density})
+    plot_graph(df, region)