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CAS - Submit Python and R Code

ACCESS THE CUSTOM STEP FOLDER

CAS - Submit Python and R Code

Description​

The "CAS - Submit Python and R Code" provides a wrapping for the CAS action gateway.runLang.

Use this custom step to execute open-source programs, taking advantage of parallelization, multiple threads and fast data exchange mechanisms (backed by the Apache Arrow in-memory data format).

The step supports up to 10 input tables and up to 10 output tables (It's a limitation of the custom step definition, not a limitation of the CAS action). You can access those tables in Python/R script as follows

Python example:

# Read from input table 1
df = gateway.read_table(gateway.args['inputtable1'])
 
# Write to output table1
gateway.write_table(df, (gateway.args['outputtable1'])

R example:

# Read from input table 1
tbl <- read_table(gw$args[['inputtable1']])

# Write to output table1
write_table(tbl, gw$args[['outputtable1']])

Additionally, there are two variables, named inputTableCounter and outputTableCounter, representing how many input and output tables are connected to the step.

User Interface​

  • Definition tab​

    Definition

  • Options tab​

    Options

Requirements​

SAS Viya 2023.11 or later

Ensure that Python and R are configured correctly according to the SAS documentation.

Usage​

Find a demonstration of this step in this YouTube video: CAS - Submit Python and R Code | Custom Step

Change Log​

  • Version 1.1 (05MAY2025)

    • Fix Bug in from Flow Mode execution

    • Update readme

  • Version 1.01 (11JAN2024)

    • Updated readme

  • Version 1.0 (19NOV2023)

    • Initial version