Source is the action of importing method declarations from other DML scripts.
This function allows one to define a function in DML and use it in the python API.
Although it is possible to generate sources with the function calls or object construction specified below,
the recommended way is to use the method defined on
SystemDSContext called source to construct one
using a path to the dml file to source.
- class systemds.operator.Source(sds_context, path: str, name: str)
- __init__(sds_context, path: str, name: str)
Create general OperationNode
sds_context – The SystemDS context for performing the operations
operation – The name of the DML function to execute
unnamed_input_nodes – inputs identified by their position, not name
named_input_nodes – inputs with their respective parameter name
output_type – type of the output in DML (double, matrix etc.)
is_python_local_data – if the data is local in python e.g. Numpy arrays
number_of_outputs – If set to other value than 1 then it is expected that this operation node returns multiple values. If set remember to set the output_types value as well.
output_types – The types of output in a multi output scenario. Default is None, and means every multi output is a matrix.
- code_line(var_name: str, unnamed_input_vars: Sequence[str], named_input_vars: Dict[str, str]) str
Generates the DML code line equal to the intended action of this node.
var_name – Name of DML-variable this nodes result should be saved in
unnamed_input_vars – all strings representing the unnamed parameters
named_input_vars – all strings representing the named parameters (name value pairs)
the DML code line that is equal to this operation
- compute(verbose: bool = False, lineage: bool = False)
Get result of this operation. Builds the dml script and executes it in SystemDS, before this method is called all operations are only building the DAG without actually executing (lazy evaluation).
verbose – Can be activated to print additional information such as created DML-Script
lineage – Can be activated to print lineage trace till this node
the output as an python builtin data type or numpy array