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# DataFusion Python Examples

Some examples rely on data which can be downloaded from the following site:

- https://www.nyc.gov/site/tlc/about/tlc-trip-record-data.page

Here is a direct link to the file used in the examples:

- https://d37ci6vzurychx.cloudfront.net/trip-data/yellow_tripdata_2021-01.parquet

### Creating a SessionContext

- [Creating a SessionContext](./create-context.py)

### Executing Queries with DataFusion

- [Query a Parquet file using SQL](./sql-parquet.py)
- [Query a Parquet file using the DataFrame API](./dataframe-parquet.py)
- [Run a SQL query and store the results in a Pandas DataFrame](./sql-to-pandas.py)
- [Query PyArrow Data](./query-pyarrow-data.py)

### Running User-Defined Python Code

- [Register a Python UDF with DataFusion](./python-udf.py)
- [Register a Python UDAF with DataFusion](./python-udaf.py)

### Substrait Support

- [Serialize query plans using Substrait](./substrait.py)

### Executing SQL against DataFrame Libraries (Experimental)

- [Executing SQL on Polars](./sql-on-polars.py)
- [Executing SQL on Pandas](./sql-on-pandas.py)
- [Executing SQL on cuDF](./sql-on-cudf.py)