Refactor webscraping-and-apis notebook:

- Import `lets_plot` at the beginning for clarity.
- Adjust DataFrame column operations for better readability.
- Simplify plot creation by using parentheses for chaining.
- Remove unnecessary imports and whitespace for cleaner code.

Author: ugohuche

data/bake_sale.xlsx

@@ -417,8 +417,8 @@
    "outputs": [],
    "source": [
     "df = pl.read_database(\n",
-    "    query=sql_join,      # your SQL query (string)\n",
-    "    connection=con       # your connection object (SQLAlchemy, psycopg2 cursor, etc.)\n",
+    "    query=sql_join,  # your SQL query (string)\n",
+    "    connection=con,  # your connection object (SQLAlchemy, psycopg2 cursor, etc.)\n",
     ")"
    ]
   },

databases.ipynb

@@ -576,8 +576,7 @@
     "    {\"name\": {\"given\": \"Mark\", \"family\": \"Regner\"}},\n",
     "    {\"id\": 2, \"name\": \"Faye Raker\"},\n",
     "]\n",
-    "pl.json_normalize(data)\n",
-    "\n"
+    "pl.json_normalize(data)"
    ]
   },
   {