What's New in the LabKey 4.2.0 package

Release date: 02/27/2026

• Add get_queries to query module
  • Accessible via API wrapper as api.query.get_queries

What's New in the LabKey 4.1.0 package

Release date: 02/24/2026

• Add array filter types
• Use importlib to determine client version
• Update build to use Hatch

• Update the minimum required version of Python to 3.11. Correction from the 4.0.0 release.

• Add save_rows API to query module
  • Accessible via API wrappers e.g. api.query.save_rows
• Update the minimum required version of Python to 3.10
• Add derivationDataScope to PropertyDescriptor class. Thanks @eso-xyme!

• Add "valueExpression" to PropertyDescriptor class
  • needed for creating/adding domain calculated fields
  • update Domain class to append calculatedFields to the domain's fields
• Fix Issue 52904
  • UnexpectedRedirectError is not wrapped with ServerContextError
  • Allow redirects when deactivating users

• Add import_rows API to query module
  • Accessible via API wrappers e.g. api.query.import_rows

• Add lineage API to experiment module
  • Accessible via API wrappers e.g. api.experiment.lineage()

• ServerContext
  • Add allow_redirects flag (defaults to False) to constructor
  • Add allow_redirects flag to make_request
• APIWrapper: Add allow_redirects flag (defaults to False)
• Add UnexpectedRedirectError
  • thrown when allow_redirects is False and the server issues a redirect

• Query API - WAF encode "sql" parameter for execute_sql
  • WAF encoding of parameters is initially supported with LabKey Server v23.09
  • WAF encoding can be opted out of on execute_sql calls by specifying waf_encode_sql=False
• Query API - add optional parameters to insert_rows, update_rows, and delete_rows
• Query API - add move_rows()
  • earliest compatible LabKey Server version: 24.1.0

Query API - Change max_rows default value to -1 in select_rows