From 927cccba4c85ed24c0beab36b32fac81a1b070da Mon Sep 17 00:00:00 2001 From: Robin Linacre Date: Mon, 29 Jan 2024 14:29:23 +0000 Subject: [PATCH] raise error if user passes list to block_on --- splink/blocking_rule_library.py | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/splink/blocking_rule_library.py b/splink/blocking_rule_library.py index d498753bac..38ed33d27d 100644 --- a/splink/blocking_rule_library.py +++ b/splink/blocking_rule_library.py @@ -157,6 +157,13 @@ def block_on( salting_partitions=None, arrays_to_explode=None, ) -> BlockingRuleCreator: + if isinstance(col_names_or_exprs[0], list): + raise TypeError( + "block_on no longer accepts a list as the first argument. " + "Please pass individual column names or expressions as separate arguments" + ' e.g. block_on("first_name", "dob") not block_on(["first_name", "dob"])' + ) + if len(col_names_or_exprs) == 1: br = ExactMatchRule(col_names_or_exprs[0]) else: