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IO Nodes

This document provides detailed information about the available I/O Nodes. Each node is described with its functionality, options, and exceptions.

Nodes​

1. ReadCsvNode​

Description:
Reads a CSV file into a pandas DataFrame.

Options:

  • file (FileParameter): The CSV file to read.
  • sep (StringParameter): Column delimiter (default: ,).
  • header (StringParameter): Row number containing column names (0-indexed, default: infer).

Exceptions:

  • Raises NodeException for any error during file reading or DataFrame conversion.

2. ReadJsonNode​

Description:
Reads a JSON file into a workflow.

Options:

  • file (FileParameter): The JSON file to read.
  • multiline (BooleanParameter): Indicates if the file contains multiple JSON objects (default: False).
  • pollingTime (IntegerParameter): Polling interval in seconds (default: 0).

Exceptions:

  • Raises NodeException for any error during file reading or JSON parsing.

3. TableCreatorNode​

Description:
Accepts raw-text CSV input to create data tables.

Options:

  • input (TextParameter): The raw text input (default: empty string).
  • sep (StringParameter): Column delimiter (default: ,).
  • header (StringParameter): Row number containing column names (default: infer).

Exceptions:

  • Raises NodeException for any error during data table creation.

4. WriteCsvNode​

Description:
Writes the current DataFrame to a CSV file.

Options:

  • file (StringParameter): The filename for the CSV file.
  • sep (StringParameter): Column delimiter (default: ,).
  • index (BooleanParameter): Indicates whether to write the index as a column (default: True).

Exceptions:

  • Raises NodeException for any error during file writing or data conversion.

5. WriteJsonToCsvNode​

Description:
Writes JSON data to a CSV file. The JSON must be a single object or a list of objects with the same structure.

Options:

  • file (StringParameter): The filename for the CSV file.
  • write_mode (SelectParameter): Choose between overwrite or append (default: append).
  • exclude (StringParameter): Exclude JSON matching a specific JMESPath query (default: empty).

Exceptions:

  • Raises NodeException for any error during file writing or data conversion.

6. WriteJsonNode​

Description:
Writes JSON data to a file.

Options:

  • file (StringParameter): The filename for the JSON file.
  • write_mode (SelectParameter): Choose between overwrite or append (default: append).
  • exclude (StringParameter): Exclude JSON matching a specific JMESPath query (default: empty).

Exceptions:

  • Raises NodeException for any error during file writing or data conversion.

Note: Ensure proper configuration of each node before execution to avoid unexpected errors.