diff --git a/piker/data/_pathops.py b/piker/data/_formatters.py
similarity index 100%
rename from piker/data/_pathops.py
rename to piker/data/_formatters.py
diff --git a/piker/ui/_interaction.py b/piker/ui/_interaction.py
index 9e9b2d3b..e9a7089f 100644
--- a/piker/ui/_interaction.py
+++ b/piker/ui/_interaction.py
@@ -494,7 +494,7 @@ class ChartView(ViewBox):
         chart = self.linked.chart
 
         # don't zoom more then the min points setting
-        l, lbar, rbar, r = chart.get_viz(chart.name).bars_range()
+        out = l, lbar, rbar, r = chart.get_viz(chart.name).bars_range()
         # vl = r - l
 
         # if ev.delta() > 0 and vl <= _min_points_to_show:
diff --git a/piker/ui/_render.py b/piker/ui/_render.py
index 8245c2d9..96c7e069 100644
--- a/piker/ui/_render.py
+++ b/piker/ui/_render.py
@@ -37,7 +37,7 @@ from ..data._sharedmem import (
     ShmArray,
 )
 from ..data.feed import Flume
-from ..data._pathops import (
+from ..data._formatters import (
     IncrementalFormatter,
     OHLCBarsFmtr,  # Plain OHLC renderer
     OHLCBarsAsCurveFmtr,  # OHLC converted to line