Import struttura base del progetto

.gitignore

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+
+# Created by https://www.toptal.com/developers/gitignore/api/Python,Pycharm
+# Edit at https://www.toptal.com/developers/gitignore?templates=Python,Pycharm
+
+### PyCharm ###
+# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio, WebStorm and Rider
+# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
+
+# User-specific stuff
+.idea
+
+# CMake
+cmake-build-*/
+
+# File-based project format
+*.iws
+
+# IntelliJ
+out/
+
+# JIRA plugin
+atlassian-ide-plugin.xml
+
+### Python ###
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+cover/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+.pybuilder/
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+#   For a library or package, you might want to ignore these files since the code is
+#   intended to run in multiple environments; otherwise, check them in:
+# .python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+# pytype static type analyzer
+.pytype/
+
+# Cython debug symbols
+cython_debug/
+
+# End of https://www.toptal.com/developers/gitignore/api/Python,Pycharm

Makefile

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+init:
+	pip install -r requirements.txt
+
+test:
+	nosetests tests

db/access.py

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+from typing import List
+
+from psycopg2 import connect, extras as dbopts
+
+from models.department import Department
+from models.employee import Employee
+from models.location import Location
+
+db_url: str = 'postgresql://postgres:@localhost:5432/postgres'
+
+
+def __create_department(row):
+    return Department(
+        department_id=row["department_id"],
+        name=row["department_name"],
+        location=Location(
+            location_id=row["location_id"],
+            postal_code=row["postal_code"],
+            street_address=row["street_address"],
+            state_province=row["state_province"],
+            country_id=row["country_id"],
+            city=row["city"]
+        ))
+
+
+def fetch_european_departments() -> List[Department]:
+    """
+    Ricerca tutti i dipartimenti dei paesi europei dove sono presenti
+    dei dipartimenti.
+    :return: elenco dei dipartimenti europei
+    """
+    with connect(db_url) as connection:
+        with connection.cursor(cursor_factory=dbopts.DictCursor) as cursor:
+            cursor.execute(
+                """
+                select
+                    d.department_id,
+                    d.department_name,
+                    d.location_id,
+                    l.postal_code,
+                    l.street_address,
+                    l.city,
+                    l.state_province,
+                    l.country_id 
+                from
+                    hr.departments d
+                left join hr.locations l on
+                    d.location_id = l.location_id
+                where
+                    l.country_id in ('UK', 'DE')
+                """
+            )
+
+            # Prendo dal DB tutti i dipartimenti presenti nel Regno Unito e Germania
+            departments = [__create_department(row) for row in cursor.fetchall()]
+
+    return departments
+
+
+def fetch_department_employees(department_id: int) -> List[Employee]:
+    """
+    Ricerca tutti i dipendenti di un dipartimento
+    :param department_id: dipartimento da ricercare
+    :return: elenco dei dipendenti
+    """
+    employees = []
+    with connect(db_url) as connection:
+        with connection.cursor(cursor_factory=dbopts.DictCursor) as cursor:
+            cursor.execute(
+                f"""
+                select
+                    e.employee_id,
+                    e.first_name,
+                    e.last_name,
+                    e.email,
+                    e.phone_number,
+                    e.hire_date,
+                    e.job_id,
+                    e.salary,
+                    e.manager_id,
+                    e.department_id
+                from
+                    hr.employees e
+                where
+                    e.department_id = {department_id}
+                """,
+                department_id
+            )
+
+            # Prendo dal DB tutti i dipendenti di un dipartimento
+            for row in cursor.fetchall():
+                employees.append(Employee(
+                    employee_id=row["employee_id"],
+                    first_name=row["first_name"],
+                    last_name=row["last_name"],
+                    email=row["email"],
+                    phone_number=row["phone_number"],
+                    hire_date=row["hire_date"],
+                    job_id=row["job_id"],
+                    salary=row["salary"],
+                    manager_id=row["manager_id"],
+                    department=None
+                ))
+
+    return employees

main.py

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+import itertools
+from datetime import date
+
+from dateutil import relativedelta as datedelta
+
+from db.access import fetch_european_departments, fetch_department_employees
+
+if __name__ == '__main__':
+    # Ricerco tutti i dipartimenti europei
+    for department in fetch_european_departments():
+        print(f"\n####### Department of {department.name} #######\n")
+        # Per ogni dipartimento ricerco i suoi impiegati
+        employees = [employee for employee in fetch_department_employees(department.department_id)]
+        for employee in employees:
+            print(f"{employee.last_name} {employee.first_name}")
+
+        print("\n")
+        # Raggruppo gli impiegati per anni di anzianità
+        calculate_seniority = lambda e: datedelta.relativedelta(date.today(), e.hire_date).years
+        employee_group_by_years = itertools.groupby(employees, calculate_seniority)
+        # Stampo i risultati dell'aggregazione
+        for years_to_employees in employee_group_by_years:
+            print(f"Employees with {years_to_employees[0]} years of seniority:")
+            for employee in years_to_employees[1]:
+                print(employee.last_name, employee.first_name)
+            print("\n")

models/department.py

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+from models.location import Location
+
+
+class Department:
+    def __init__(self, department_id: int, name: str, location: Location):
+        self.__department_id = department_id
+        self.__name = name
+        self.__location = location
+
+    @property
+    def department_id(self) -> int:
+        return self.__department_id
+
+    @property
+    def name(self) -> str:
+        return self.__name
+
+    @property
+    def location_id(self) -> Location:
+        return self.__location
+
+    def __str__(self):
+        return f"Department({self.__department_id}, {self.__name}, {self.__location})"

models/employee.py

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+from datetime import date
+
+from models.department import Department
+
+
+class Person:
+    def __init__(self, first_name, last_name):
+        self.__first_name = first_name
+        self.__last_name = last_name
+
+    @property
+    def first_name(self) -> str:
+        return self.__first_name
+
+    @property
+    def last_name(self) -> str:
+        return self.__last_name
+
+
+class Employee(Person):
+    def __init__(self, employee_id, first_name, last_name, email, phone_number,
+                 hire_date, department, job_id=0, salary=0, manager_id=0):
+        super().__init__(first_name, last_name)
+        self.__employee_id = employee_id
+        self.__email = email
+        self.__phone_number = phone_number
+        self.__hire_date = hire_date
+        self.__department = department
+        self.__job_id = job_id
+        self.__salary = salary
+        self.__manager_id = manager_id
+
+    @property
+    def employee_id(self) -> int:
+        return self.__employee_id
+
+    @property
+    def email(self) -> str:
+        return self.__email
+
+    @property
+    def phone_number(self) -> str:
+        return self.__phone_number
+
+    @property
+    def hire_date(self) -> date:
+        return self.__hire_date
+
+    @property
+    def department(self) -> Department:
+        return self.__department
+
+    @property
+    def job_id(self) -> int:
+        return self.__job_id
+
+    @property
+    def salary(self) -> float:
+        return self.__salary
+
+    @property
+    def manager_id(self) -> int:
+        return self.__manager_id
+
+    def __str__(self):
+        return f"Employee({self.__employee_id}, {self.first_name}, {self.last_name}, " \
+               f"{self.__email}, {self.__phone_number}, {self.__hire_date})"

models/location.py

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+class Location:
+    def __init__(self, location_id: int, street_address: str, postal_code: str,
+                 city: str, state_province: str, country_id: int):
+        self.__location_id = location_id
+        self.__street_address = street_address
+        self.__postal_code = postal_code
+        self.__city = city
+        self.__state_province = state_province
+        self.__country_id = country_id
+
+    @property
+    def location_id(self) -> int:
+        return self.__location_id
+
+    @property
+    def street_address(self) -> str:
+        return self.__street_address
+
+    @property
+    def postal_code(self) -> str:
+        return self.__postal_code
+
+    @property
+    def city(self) -> str:
+        return self.__city
+
+    @property
+    def state_province(self) -> str:
+        return self.__state_province
+
+    @property
+    def country_id(self) -> int:
+        return self.__country_id
+
+    def __str__(self):
+        return f"Location({self.__location_id}, {self.__postal_code}, " \
+               f"{self.__street_address}, {self.__city}, {self.__state_province}) "

requirements.txt

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+records~=0.5.3
+psycopg2-binary~=2.9.1
+setuptools~=57.0.0
+python-dateutil~=2.8.1

setup.py

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+from setuptools import setup
+
+setup(
+    name='hr-resources',
+    version='0.1.0',
+    packages=[''],
+    url='',
+    license='',
+    author='Fabio Scotto di Santolo',
+    author_email='fabio.scottodisantolo@gmail.com',
+    description='Servizio per la visualizzazione delle risorse umane'
+)