# Step-Level Actions ⚠️ WARNING: Validation step '1' exceeded threshold! ❌ ERROR: Critical validation failure in step '2'! This requires immediate attention.
Pointblank Validation
Validation with actions Polars
STEP COLUMNS VALUES TBL EVAL UNITS PASS FAIL W E C EXT
#AAAAAA 1
col_vals_between()

Column 'distance' range check.

 distance [100, 2000] ✓ 337K 283K
0.84		 53.3K
0.16		 ● -- -- CSV
#EBBC14 2
col_vals_gt()

Column 'origin' check for minimum value.

 air_time 25 ✓ 337K 336K
1.00		 359
0.00		 -- ● -- CSV
#4CA64C 3
col_vals_not_null()

Column 'carrier' completeness check.

 carrier -- ✓ 337K 337K
1.00		 0
0.00		 ○ ○ -- --
2026-10-15 18:25:30 UTC< 1 s2026-10-15 18:25:30 UTC
Notes

Step 1 (local_thresholds) Step-specific thresholds set with W:0.1.

Step 2 (local_thresholds) Step-specific thresholds set with E:200.

Step 3 (local_thresholds) Step-specific thresholds set with W:1|E:0.05.
``` python import pointblank as pb def log_warning(): """Custom action to log validation warnings""" metadata = pb.get_action_metadata() print(f"⚠️ WARNING: Validation step '{metadata['step']}' exceeded threshold!") def log_error(): """Custom action to log validation errors""" metadata = pb.get_action_metadata() print(f"❌ ERROR: Critical validation failure in step '{metadata['step']}'!") print(f" This requires immediate attention.") validation = ( pb.Validate( data=pb.load_dataset(dataset="nycflights", tbl_type="polars"), label="Validation with actions" ) .col_vals_between( columns="distance", left=100, right=2000, thresholds=pb.Thresholds(warning=0.1), # Allow 10% failures before warning actions=pb.Actions(warning=log_warning), brief="Column 'distance' range check." ) .col_vals_gt( columns="air_time", value=25, na_pass=True, thresholds=pb.Thresholds(error=200), # Allow only 200 failures before error actions=pb.Actions(error=log_error), brief="Column 'origin' check for minimum value." ) .col_vals_not_null( columns="carrier", thresholds=(1, 0.05), # No tolerance for null values actions=pb.Actions(warning=log_warning, error=log_error), brief="Column 'carrier' completeness check." ) .interrogate() ) validation ``` Preview of Input Table
PolarsRows336,776Columns18
year Int64
month Int64
day Int64
dep_time Int64
sched_dep_time Int64
dep_delay Int64
arr_time Int64
sched_arr_time Int64
arr_delay Int64
carrier String
flight Int64
tailnum String
origin String
dest String
air_time Int64
distance Int64
hour Int64
minute Int64
1 2013 1 1 517 515 2 830 819 11 UA 1545 N14228 EWR IAH 227 1400 5 15
2 2013 1 1 533 529 4 850 830 20 UA 1714 N24211 LGA IAH 227 1416 5 29
3 2013 1 1 542 540 2 923 850 33 AA 1141 N619AA JFK MIA 160 1089 5 40
4 2013 1 1 544 545 -1 1004 1022 -18 B6 725 N804JB JFK BQN 183 1576 5 45
5 2013 1 1 554 600 -6 812 837 -25 DL 461 N668DN LGA ATL 116 762 6 0
336772 2013 9 30 None 1455 None None 1634 None 9E 3393 None JFK DCA None 213 14 55
336773 2013 9 30 None 2200 None None 2312 None 9E 3525 None LGA SYR None 198 22 0
336774 2013 9 30 None 1210 None None 1330 None MQ 3461 N535MQ LGA BNA None 764 12 10
336775 2013 9 30 None 1159 None None 1344 None MQ 3572 N511MQ LGA CLE None 419 11 59
336776 2013 9 30 None 840 None None 1020 None MQ 3531 N839MQ LGA RDU None 431 8 40