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You just got hired as the first and only data practitioner at a small business experiencing exponential growth. The company needs more structured processes, guidelines, and standards. Your first mission is to structure the human resources data. The data is currently scattered across teams and files and comes in various formats: Excel files, CSVs, JSON files...

You'll work with the following data in the datasets folder:

  • Office addresses
    • Saved in office_addresses.csv.
    • If the value for office is NaN, then the employee is remote.
  • Employee addresses
    • Saved on the first tab of employee_information.xlsx.
  • Employee emergency contacts
    • Saved on the second tab of employee_information.xlsx; this tab is called emergency_contacts.
    • However, this sheet was edited at some point, and the headers were removed! The HR manager let you know that they should be: employee_id, last_name, first_name, emergency_contact, emergency_contact_number, and relationship.
  • Employee roles, teams, and salaries
    • This information has been exported from the company's human resources management system into a JSON file titled employee_roles.json. Here are the first few lines of that file:
{"A2R5H9":
  {
    "title": "CEO",
    "monthly_salary": "$4500",
    "team": "Leadership"
  },
 ...
}

# Import pandas
import pandas as pd

# Read in employee_information.xlsx
employee_addresses = pd.read_excel("datasets/employee_information.xlsx", sheet_name=0)
emergency_contacts = pd.read_excel("datasets/employee_information.xlsx", sheet_name=1, header=None, names=['employee_id', 'last_name', 'first_name', 'emergency_contact', 'emergency_contact_number', 'relationship'])

# Read in employee_roles.json
roles = pd.read_json('datasets/employee_roles.json', orient='index')

# Read in office_addresses.csv
office_addresses = pd.read_csv('datasets/office_addresses.csv')
roles.head()
# Merge employee_addresses with office_address
employees = employee_addresses.merge(office_addresses, how='left', left_on='employee_country', right_on='office_country')
employees.head()
# Merge employees with roles
employees = employees.merge(roles, left_on='employee_id', right_on=roles.index)
employees.head()
# Merge employees with emergency_contacts
employees = employees.merge(emergency_contacts, on='employee_id')
employees.head()
# Replace null values with 'Remote' for columns starting with 'office'
for col in employees.columns:
    if col.startswith('office'):
        employees[col].fillna('Remote', inplace=True)
employees.head()
# Subset columns and set index key
final_columns = ['employee_id', 'employee_first_name', 'employee_last_name', 'employee_country', 'employee_city', 'employee_street', 'employee_street_number', 'emergency_contact', 'emergency_contact_number', 'relationship', 'monthly_salary', 'team', 'title', 'office', 'office_country', 'office_city', 'office_street', 'office_street_number']
employees_final = employees[final_columns].set_index('employee_id')
employees_final.head()