Semaine 7

Semaine_07/Jour_03/python/connector/.env

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+DB_HOST=localhost
+DB_USER=mysql_user
+DB_PASSWORD=Azerty123
+DB_NAME=company

Semaine_07/Jour_03/python/connector/.python-version

@@ -0,0 +1 @@
+3.12

Semaine_07/Jour_03/python/connector/main.py

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+import os
+
+from dotenv import load_dotenv
+from mysql.connector import Error, connect, errorcode
+
+load_dotenv()
+
+db_host = os.environ.get("DB_HOST")
+db_user = os.environ.get("DB_USER")
+db_password = os.environ.get("DB_PASSWORD")
+db_name = os.environ.get("DB_NAME")
+
+try:
+    connection = connect(
+        host= db_host,
+        user= db_user,
+        password= db_password,
+        database= db_name
+    ) 
+    
+    cursor = connection.cursor()
+    ### Exemple 1 : commande
+    # cursor.execute("SELECT * FROM employee LIMIT 5")
+    # results = cursor.fetchone()
+    # print(results)
+
+    # ### Exemple 2 : requête complète comme variable
+    # query = """
+    # CREATE TABLE IF NOT EXISTS movies (
+    # id INT AUTO_INCREMENT PRIMARY KEY,
+    # title VARCHAR(100),
+    # release_year YEAR(4),
+    # genre VARCHAR(100),
+    # collection_in_mil DECIMAL(4,1)
+    # )
+    # """
+    # cursor.execute(query)
+    # # CIUD : Create, Insert, Update, Delete => Commit
+    # connection.commit()
+
+    ### Exemple 3 : multiple requête
+    insert_query = """
+    INSERT INTO movies (title, release_year, genre, collection_in_mil)
+    VALUES
+        ("Forrest Gump", 1994, "Drama", 330.2),
+        ("INception", 2010, "Aventure", 293.7),
+        ("Titanic", 1995, "Drama", 530.4)
+    """
+
+    create_query = """
+    CREATE TABLE IF NOT EXISTS reviewers (
+    id INT AUTO_INCREMENT PRIMARY KEY,
+    firstname VARCHAR(100),
+    lastname VARCHAR(100)
+    )
+    """
+
+    insert_query_2 = """
+    INSERT INTO reviewers (firstname, lastname)
+    VALUES (%s, %s)
+    """
+
+    reviewers = [
+        ("Jean", "FAIBLE"),
+        ("Alain", "TERIEUR"),
+        ("Tabatha", "CLOISON"),
+        ("Ahmed", "BIEN")
+    ]
+
+    cursor.execute(insert_query)
+    cursor.execute(create_query)
+    cursor.executemany(insert_query_2, reviewers)
+    connection.commit()
+    
+    cursor.execute("SELECT * FROM movies")
+    # lire un par un
+    resultat = cursor.fetchone()
+    print(resultat)
+    while resultat is not None:
+        print(resultat)
+        resultat = cursor.fetchone()
+
+    # utilisation de lot
+    cursor.execute("SELECT * FROM movies")
+    batch = cursor.fetchmany(size= 4)
+    while batch:
+        print("----")
+        for row in batch:
+            print(row)
+        batch = cursor.fetchmany(4)
+
+    # Out of Memory
+
+    insert_movies_query = """
+    INSERT INTO movies (title, release_year, genre, collection_in_mil)
+    VALUES (%s, %s, %s, %s) 
+    """
+
+    with open("movies.csv", "r") as fichier:
+        reader = csv.reader(fichier)
+        next(reader)
+
+except Error as error:
+    match error.errno:
+        case errorcode.ER_ACCESS_DENIED_ERROR:
+            print("Accès refusé. Vérifier USER et PASSWORD")
+        case errorcode.ER_BAD_DB_ERROR:
+            print("BDD n'existe pas")
+        case _:
+            print(f"Erreur {error}")
+finally:
+    if cursor is not None:
+        cursor.close()
+    if connection is not None and connection.is_connected():
+        connection.close()

Semaine_07/Jour_03/python/connector/pyproject.toml

@@ -0,0 +1,10 @@
+[project]
+name = "connector"
+version = "0.1.0"
+description = "Add your description here"
+readme = "README.md"
+requires-python = ">=3.12"
+dependencies = [
+    "mysql-connector-python>=9.6.0",
+    "python-dotenv>=1.2.2",
+]

Semaine_07/Jour_03/python/connector/uv.lock

@@ -0,0 +1,51 @@
+version = 1
+revision = 3
+requires-python = ">=3.12"
+
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+version = "0.1.0"
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+    { name = "mysql-connector-python" },
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+]
+
+[package.metadata]
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