Add environment configuration, some fixes in main.py (size).

main.py

@@ -111,7 +111,7 @@ class MainWindow(QMainWindow):
         # You must call the super class method
         QMainWindow.__init__(self)
 
-        self.setMinimumSize(QSize(480, 80))  # Set sizes
+        self.setMinimumSize(QSize(640, 480))  # Set sizes
         self.setWindowTitle("postgre")  # Set the window title
         central_widget = QWidget(self)  # Create a central widget
         self.setCentralWidget(central_widget)  # Install the central widget
@@ -202,7 +202,14 @@ class NeoWindow(QWidget):
 if __name__ == "__main__":
     import sys
 
-    conn = psycopg2.connect("user=postgres password=456 host=localhost port=5432")
+    conn = psycopg2.connect(
+        "user={0} password={1} host={2} port={3}".format(
+            POSTGRES_USER,
+            POSTGRES_PASS,
+            POSTGRES_HOST,
+            POSTGRES_PORT,
+        )
+    )
 
     createuUiversityDB(conn)
 
@@ -222,15 +229,17 @@ if __name__ == "__main__":
     mw.load_data(users)
     mw.show()
 
-    URI = NEO_HOST
-    AUTH = (NEO_USER, NEO_PASS)
+    if os.getenv('NEO_ACTIVE') == 'true':
+        URI = NEO_HOST
+        AUTH = (NEO_USER, NEO_PASS)
 
-    with GraphDatabase.driver(URI, auth=AUTH) as driver:
-        records, summary, keys = driver.execute_query(
-            "MATCH (nineties:Movie) WHERE nineties.released >= 1990 AND nineties.released < 2000 RETURN nineties"
-        )
+        with GraphDatabase.driver(URI, auth=AUTH) as driver:
+            records, summary, keys = driver.execute_query(
+                "MATCH (nineties:Movie) WHERE nineties.released >= 1990 AND nineties.released < 2000 RETURN nineties"
+            )
+
+        neo_window = NeoWindow(mw)
+        neo_window.load_data(records)
+        neo_window.show()
 
-    neo_window = NeoWindow(mw)
-    neo_window.load_data(records)
-    neo_window.show()
     sys.exit(app.exec())