demographic_data_analyzer.py

import pandas as pd


def calculate_demographic_data(print_data=True):
    # Read data from file
    df = pd.read_csv('adult.data.csv')

    # How many of each race are represented in this dataset? This should be a Pandas series with race names as the index labels.
    race_count = df['race'].value_counts()

    # What is the average age of men?
    # 1. using groupby to calculate average age based on its sex
    average_age = df[['age', 'sex']].groupby(['sex']).mean()
    # 2. take only the value for 'Male'
    average_age_men = round(average_age.loc['Male'].values[0], 1)

    # What is the percentage of people who have a Bachelor's degree? 
    # 1. count how many records for each education
    education_count = df['education'].value_counts()
    # 2. calculate the percentage of bachelors
    percentage_bachelors = round(education_count.loc['Bachelors'] / len(df) * 100, 1)

    # What percentage of people with advanced education (`Bachelors`, `Masters`, or `Doctorate`) make more than 50K?
    # What percentage of people without advanced education make more than 50K?

    # with and without `Bachelors`, `Masters`, or `Doctorate`
    higher_education = df[df.education.isin(['Bachelors', 'Masters', 'Doctorate'])]
    lower_education = df[~df.education.isin(['Bachelors', 'Masters', 'Doctorate'])]

    # percentage with salary >50K
    higher_education_rich = round(higher_education['salary'].value_counts().loc['>50K'] / len(higher_education) * 100, 1)
    lower_education_rich = round(lower_education['salary'].value_counts().loc['>50K'] / len(lower_education) * 100, 1)

    # What is the minimum number of hours a person works per week (hours-per-week feature)?
    min_work_hours = df['hours-per-week'].min()

    # What percentage of the people who work the minimum number of hours per week have a salary of >50K?
    num_min_workers = len(df[df['hours-per-week'] == 1])
    num_min_workers_rich = len(df[(df['hours-per-week'] == 1) & (df['salary'] == '>50K')])
    rich_percentage = round(num_min_workers_rich / num_min_workers * 100, 1)

    # What country has the highest percentage of people that earn >50K?
    salary_by_country = df.groupby(['native-country', 'salary'])['salary'].count()
    percent_salary_by_country = salary_by_country.groupby(level=0).apply(lambda x: x/x.sum() * 100)
    highest_earning_country = percent_salary_by_country.groupby(level=1).idxmax().loc['>50K'][0]
    highest_earning_country_percentage = round(percent_salary_by_country.groupby(level=1).max().loc['>50K'], 1)

    # Identify the most popular occupation for those who earn >50K in India.
    India_and_rich = df[(df['salary'] == '>50K') & (df['native-country'] == 'India')]
    top_IN_occupation = India_and_rich['occupation'].value_counts().idxmax()

    # DO NOT MODIFY BELOW THIS LINE

    if print_data:
        print("Number of each race:\n", race_count) 
        print("Average age of men:", average_age_men)
        print(f"Percentage with Bachelors degrees: {percentage_bachelors}%")
        print(f"Percentage with higher education that earn >50K: {higher_education_rich}%")
        print(f"Percentage without higher education that earn >50K: {lower_education_rich}%")
        print(f"Min work time: {min_work_hours} hours/week")
        print(f"Percentage of rich among those who work fewest hours: {rich_percentage}%")
        print("Country with highest percentage of rich:", highest_earning_country)
        print(f"Highest percentage of rich people in country: {highest_earning_country_percentage}%")
        print("Top occupations in India:", top_IN_occupation)

    return {
        'race_count': race_count,
        'average_age_men': average_age_men,
        'percentage_bachelors': percentage_bachelors,
        'higher_education_rich': higher_education_rich,
        'lower_education_rich': lower_education_rich,
        'min_work_hours': min_work_hours,
        'rich_percentage': rich_percentage,
        'highest_earning_country': highest_earning_country,
        'highest_earning_country_percentage':
        highest_earning_country_percentage,
        'top_IN_occupation': top_IN_occupation
    }