Processing Data

Data Processing Tools

Tools for working with CSV files and pandas DataFrames.

CSV Operations

List available CSV files

result = await list_csv_files()
# Returns: {"success": True, "data": ["file1", "file2"], "count": 2}

Read CSV content

result = await read_csv_file("mydata", row_limit=100)
# Returns rows as list of dicts

Query with SQL (DuckDB)

result = await query_csv_file("mydata", "SELECT * FROM mydata WHERE value > 10")

Security: Only SELECT queries allowed. INSERT, UPDATE, DELETE rejected.

Add/remove CSV files

await add_csv_file("/path/to/file.csv")
await remove_csv_file("filename")

Pandas Operations

Create DataFrame

# From CSV
result = await create_pandas_dataframe(
    dataframe_name="sales",
    create_using_function="read_csv",
    function_parameters={"filepath_or_buffer": "data.csv"}
)

# From dict
result = await create_pandas_dataframe(
    dataframe_name="mydf",
    create_using_function="DataFrame",
    function_parameters={"data": {"col1": [1, 2], "col2": [3, 4]}}
)

Allowed functions: DataFrame, read_csv, read_json, read_excel, read_parquet, read_feather, read_orc, read_html, read_xml, read_table, read_sql.

Run operations

# Get first rows
result = await run_dataframe_operation("sales", "head", {"n": 5})

# Filter data
result = await run_dataframe_operation("sales", "query", {"expr": "amount > 100"})

# Get statistics
result = await run_dataframe_operation("sales", "describe", {})

Allowed operations: head, tail, describe, query, filter, groupby, sort_values, mean, sum, count, and 100+ more safe operations.

Export DataFrame

result = await export_dataframe(
    dataframe_name="sales",
    export_function="to_csv",
    export_parameters={"path_or_buf": "output.csv", "index": False}
)

Manage DataFrames

await list_dataframes()           # List all in memory
await get_dataframe_info("sales") # Get details
await delete_dataframe("sales")   # Remove from memory

Security Notes

• CSV queries: Only SELECT statements allowed
• Pandas: Operations restricted to allowlist of safe methods
• No arbitrary code execution via getattr

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