def process_data(employee_list):
    """
    Process employee data.

    Receive the list, employee_list, as a parameter and return a dictionary of
    department:amount.
    """
    department_list = []
    for employee_data in employee_list:
        department_list.append(employee_data['Department'])

    department_data = {}
    # set() method converts iterable elements to distinct elements
    for department_name in set(department_list):
        department_data[department_name] = department_list.count(
            department_name)
    return department_data