robin-sparkless 4.4.0

PySpark-like DataFrame API in Rust on Polars; no JVM.
Documentation 
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{
  "test_id": "basic_select",
  "pyspark_version": "3.5",
  "generated_at": "2025-10-27T14:13:10.105162",
  "input_data": [
    {
      "id": 1,
      "name": "Alice",
      "age": 25,
      "salary": 50000.0,
      "department": "IT"
    },
    {
      "id": 2,
      "name": "Bob",
      "age": 30,
      "salary": 60000.0,
      "department": "HR"
    },
    {
      "id": 3,
      "name": "Charlie",
      "age": 35,
      "salary": 70000.0,
      "department": "IT"
    },
    {
      "id": 4,
      "name": "David",
      "age": 40,
      "salary": 80000.0,
      "department": "Finance"
    }
  ],
  "operation": "DataFrame operation: basic_select",
  "expected_output": {
    "schema": {
      "field_count": 3,
      "field_names": [
        "id",
        "name",
        "age"
      ],
      "field_types": [
        "long",
        "string",
        "long"
      ],
      "fields": [
        {
          "name": "id",
          "type": "long",
          "nullable": true
        },
        {
          "name": "name",
          "type": "string",
          "nullable": true
        },
        {
          "name": "age",
          "type": "long",
          "nullable": true
        }
      ]
    },
    "data": [
      {
        "id": 1,
        "name": "Alice",
        "age": 25
      },
      {
        "id": 2,
        "name": "Bob",
        "age": 30
      },
      {
        "id": 3,
        "name": "Charlie",
        "age": 35
      },
      {
        "id": 4,
        "name": "David",
        "age": 40
      }
    ],
    "row_count": 4
  }
}