initial

src/main.py

@@ -0,0 +1,45 @@
+import psycopg
+from loguru import logger
+
+def main():
+  try:
+    conn = psycopg.connect()
+    logger.info("Database connection opened")
+  except Exception as e:
+    logger.error(f"Error when opening database connection {e}"(
+    return
+
+  try:
+    with conn.cursor(cursor_factory=psycopg.extras.DictCursor) as cursor:
+      select_stmt = psycopg.sql.SQL("""
+        SELECT ...
+      """)
+      cursor.execute(select_stmt, (...))
+      row = cursor.fetchone()
+
+      if not row:
+        logger.error(f"No data found")
+        return
+
+      value = row["bla"]
+
+      # calculation
+      insert_stmt = psycopg.sql.SQL("""
+        INSERT ...
+      """)
+      cursor.execute(insert_stmt, (...))
+      conn.commit()
+
+      logger.info(f"Data successfully written to database")
+  except Exception as e:
+    logger.error(f"Error when selecting or writing database {e}")
+    conn.rollback()
+  finally:
+    conn.close()
+    logger.info("Database connection closed")
+
+if __name__ == "__main__":
+  main()
+
+       
+