Add CSV data processor DSL example

src/nodetool/examples/nodetool-base/README_EXAMPLES.md

@@ -1,6 +1,6 @@
 # NodeTool Base DSL Examples
 
-This directory contains 22 comprehensive examples demonstrating the capabilities of NodeTool's DSL for building AI-powered workflows.
+This directory contains 23 comprehensive examples demonstrating the capabilities of NodeTool's DSL for building AI-powered workflows.
 
 ## Original Examples (10)
 
@@ -20,7 +20,7 @@ This directory contains 22 comprehensive examples demonstrating the capabilities
 9. **categorize_mails_dsl.py** - Automatically classify emails with AI and apply labels
 10. **data_generator_dsl.py** - Generate synthetic datasets using AI models
 
-## New Examples (12)
+## New Examples (13)
 
 ### AI Content Generation
 11. **social_media_sentiment_dsl.py** - Analyze sentiment and emotions in social media posts
@@ -37,6 +37,7 @@ This directory contains 22 comprehensive examples demonstrating the capabilities
 20. **job_application_analyzer_dsl.py** - Analyze job descriptions and provide application advice
 21. **competitive_analysis_dsl.py** - Analyze competitor offerings and market positioning
 22. **data_validation_pipeline_dsl.py** - Validate and clean data for quality assurance
+23. **csv_data_processor_dsl.py** - Clean CSV sales pipelines and export prioritized client tables
 
 ## How to Run Examples
 

src/nodetool/examples/nodetool-base/csv_data_processor_dsl.py

@@ -0,0 +1,87 @@
+"""
+CSV Data Processor DSL Example
+
+Ingest, clean, and export sales pipeline data stored in CSV files.
+
+Workflow:
+1. **Seed Workspace** – Write a sample sales CSV file into the NodeTool workspace
+2. **Filter Records** – Keep only completed deals above a revenue threshold
+3. **Map Columns** – Rename and select the most relevant columns for reporting
+4. **Export Outputs** – Save the refined table and expose a priority client list
+"""
+
+from nodetool.dsl.graph import create_graph, run_graph
+from nodetool.dsl.nodetool.workspace import WriteTextFile
+from nodetool.dsl.nodetool.data import (
+    LoadCSVFile,
+    Filter,
+    Rename,
+    SelectColumn,
+    SaveCSVDataframeFile,
+    ToList,
+)
+from nodetool.dsl.nodetool.list import MapField
+from nodetool.dsl.nodetool.output import DataframeOutput, ListOutput
+
+
+# --- Workspace setup ---------------------------------------------------------
+sales_seed_file = WriteTextFile(
+    path="sales_pipeline.csv",
+    content=(
+        "company,region,status,revenue\n"
+        "Acme Rockets,North America,Completed,12500\n"
+        "Beacon Analytics,Europe,Prospecting,4200\n"
+        "Cascade Systems,North America,Completed,9800\n"
+        "Delta Freight,Asia Pacific,Completed,4700\n"
+        "Evergreen Labs,Europe,Completed,15750\n"
+        "Futura Robotics,Latin America,Prospecting,3100\n"
+        "Glide Solar,North America,Completed,6200\n"
+    ),
+)
+
+
+# --- Dataframe transformations -----------------------------------------------
+raw_sales = LoadCSVFile(file_path=sales_seed_file.output)
+qualified_sales = Filter(
+    df=raw_sales.output,
+    condition="status == 'Completed' and revenue >= 6000",
+)
+renamed_sales = Rename(
+    dataframe=qualified_sales.output,
+    rename_map="company:client_name,revenue:total_revenue",
+)
+selected_columns = SelectColumn(
+    dataframe=renamed_sales.output,
+    columns="client_name,region,total_revenue",
+)
+
+export_csv = SaveCSVDataframeFile(
+    dataframe=selected_columns.output,
+    filename="qualified_sales.csv",
+)
+
+sales_records = ToList(dataframe=selected_columns.output)
+priority_clients = MapField(values=sales_records.output, field="client_name")
+
+
+# --- Workflow outputs --------------------------------------------------------
+clean_table_output = DataframeOutput(
+    name="qualified_sales_table",
+    value=export_csv.output,
+)
+client_list_output = ListOutput(
+    name="priority_clients",
+    value=priority_clients.output,
+)
+
+
+graph = create_graph(clean_table_output, client_list_output)
+
+
+if __name__ == "__main__":
+    result = run_graph(graph)
+    print(
+        "Qualified sales table rows:",
+        result["qualified_sales_table"],
+    )
+    print("Priority clients:", result["priority_clients"])