Get database connector from function

src/app/model.py

@@ -1,47 +1,71 @@
 import mysql.connector
 
-# Access database using mysql connector package
-db = mysql.connector.connect(
-    user='root', 
-    password='root',
-    host='0.0.0.0',
-    database='db'
-)
+def connect_to_db():
+    try:
+        # Access database using mysql connector package
+        db = mysql.connector.connect(
+            user='root', 
+            password='root',
+            host='10.5.0.5',
+            database='db'
+        )
+    except Exception as e:
+        print(e)
+        print("Try connecting to local mysql database instead")
+        # Access local database using mysql connector package
+        db = mysql.connector.connect(
+            user='root', 
+            password='root',
+            host='0.0.0.0',
+            database='db'
+        )
+        pass
+    return db
 
 def get_users():
+    db = connect_to_db()
     cursor = db.cursor()
     query = ("SELECT userid, username from users")
     cursor.execute(query)
     users = cursor.fetchall()
     cursor.close()
+    db.close()
     return users
 
 def match_user(username, password):
+    db = connect_to_db()
     cursor = db.cursor()
     query = ("SELECT userid, username from users where username = \"" + username + 
             "\" and password = \"" + password + "\"")
     cursor.execute(query)
     user = cursor.fetchall()
+    cursor.close()
+    db.close()
     return user
 
 def set_user(username, password):
+    db = connect_to_db()
     cursor = db.cursor()
     query = ("INSERT INTO users VALUES (NULL, \"" + username + 
             "\", \"" + password + "\")")
     cursor.execute(query)
     cursor.close()
+    db.close()
 
 def get_guestbook_entries():
+    db = connect_to_db()
     cursor = db.cursor()
     query = ("SELECT entryid, text FROM guestbook")
     cursor.execute(query)
     entries = cursor.fetchall()
     cursor.close()
+    db.close()
     return entries
 
 def set_guestbook_entry(entry):
+    db = connect_to_db()
     cursor = db.cursor()
     query = ("INSERT INTO guestbook VALUES (NULL, \"" + entry + "\")")
     cursor.execute(query)
     cursor.close()
-    
+    db.close()