Using Spark, I can create a delta table with a map column type: MAP<STRING, TIMESTAMP> How do I create a delta table with a map type without Spark? I have tried multiple approaches and none of them are working. import pyarrow as pa from deltalake import write_deltalake # Create a sample Arrow Table with a map type data = { "id": pa.array([1, 2, 3]), "name": pa.array(["Alice", "Bob", "Charlie"]), "attributes": pa.array([ pa.array([("age", 30)], type=pa.map_(pa.string(), pa.int32())), pa.array([("age", 25)], type=pa.map_(pa.string(), pa.int32())), pa.array([("age", 35)], type=pa.map_(pa.string(), pa.int32())), ]) } # Create an Arrow Table table = pa.Table.from_pydict(data) # Define the path where the Delta table will be stored delta_table_path = "./tmp/delta_map" # Write the Arrow Table to a Delta table write_deltalake(delta_table_path, data=table, mode="overwrite") pyarrow throws: pyarrow.lib.ArrowTypeError: Could not convert 'a' with type str: was expecting tuple of (key, value) pair from deltalake import Schema, Field, DeltaTable, WriterProperties, write_deltalake from deltalake.schema import PrimitiveType, MapType # Define the schema for the Delta table schema = Schema([ Field("id",PrimitiveType("string")), Field("data", MapType("integer", "string", value_contains_null=False)) ]) # Create a list of data to write to the Delta table data = [ {"id": "1", "data": {"key1": "value1", "key2": "value2"}}, {"id": "2", "data": {"key3": "value3", "key4": "value4"}} ] # Create a Delta table delta_table = write_deltalake(table_or_uri="./tmp/delta_map", data=data, schema=schema,mode="append", writer_properties=WriterProperties(compression="ZSTD") ) # Write the data to the Delta table delta_table.write_data(data) deltalake throws: NotImplementedError: ArrowSchemaConversionMode.passthrough is not implemented to work with DeltaSchema, skip passing a schema or pass an arrow schema. Thx Continue reading...