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solved lab #455

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295 changes: 295 additions & 0 deletions .ipynb_checkpoints/lab-sql-python-connection-checkpoint.ipynb
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Original file line number Diff line number Diff line change
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{
"name": "stdout",
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"text": [
"Requirement already satisfied: pymysql in c:\\users\\kraus\\anaconda3\\lib\\site-packages (1.2.0)\n"
]
}
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"source": [
"!pip install pymysql"
]
},
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"execution_count": 2,
"id": "789390e3-97ec-431a-986d-bd7164d389a5",
"metadata": {},
"outputs": [],
"source": [
"from sqlalchemy import create_engine\n",
"\n",
"engine = create_engine('mysql+pymysql://root:Ironhacksummer2026!@localhost/sakila')"
]
},
{
"cell_type": "code",
"execution_count": 3,
"id": "2e114ebd-c6c7-4dd7-b597-651e12e9440f",
"metadata": {},
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"source": [
"import pandas as pd\n",
"\n",
"def rentals_month(engine, month, year):\n",
" query = f\"\"\"\n",
" SELECT * FROM rental\n",
" WHERE MONTH(rental_date) = {month} AND YEAR(rental_date) = {year}\n",
" \"\"\"\n",
" df = pd.read_sql(query, engine)\n",
" return df"
]
},
{
"cell_type": "code",
"execution_count": 4,
"id": "f0f65640-ae5c-472e-b675-6794f6858f8f",
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"source": [
"def rental_count_month(df, month, year):\n",
" counts = df.groupby('customer_id').size().reset_index(name=f'rentals_{month:02d}_{year}')\n",
" return counts"
]
},
{
"cell_type": "code",
"execution_count": 5,
"id": "9682820f-eed2-4dc1-9280-4bb852973bd2",
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"source": [
"def compare_rentals(df1, df2):\n",
" merged = pd.merge(df1, df2, on='customer_id', how='outer')\n",
" merged['difference'] = merged.iloc[:, 1] - merged.iloc[:, 2]\n",
" return merged"
]
},
{
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"id": "ee55df88-0a9b-4855-a8f9-2286e599ea23",
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"may_df = rentals_month(engine, 5, 2005)\n",
"june_df = rentals_month(engine, 6, 2005)"
]
},
{
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"<table border=\"1\" class=\"dataframe\">\n",
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" <th></th>\n",
" <th>customer_id</th>\n",
" <th>rentals_06_2005_x</th>\n",
" <th>rentals_06_2005_y</th>\n",
" <th>difference</th>\n",
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"text/plain": [
" customer_id rentals_06_2005_x rentals_06_2005_y difference\n",
"0 1 7 7 0\n",
"1 2 1 1 0\n",
"2 3 4 4 0\n",
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"585 595 2 2 0\n",
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"\n",
"[590 rows x 4 columns]"
]
},
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}
],
"source": [
"may_counts = rental_count_month(june_df, 6, 2005)\n",
"june_counts = rental_count_month(june_df, 6, 2005)\n",
"\n",
"result = compare_rentals(may_counts, june_counts)\n",
"result"
]
},
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