diff --git a/utils/df.py b/utils/df.py
index 1c2ed09..0031d76 100644
--- a/utils/df.py
+++ b/utils/df.py
@@ -38,10 +38,4 @@ def drop_col(df, name):
     df.drop(name, axis="columns", inplace=True)
 
 
-def count_true(bdf):
-    good = bdf[bdf]
-    ngood = len(good)
-    return ngood
-
-
 
diff --git a/utils/printing.py b/utils/printing.py
index 27464c5..82f2753 100644
--- a/utils/printing.py
+++ b/utils/printing.py
@@ -1,6 +1,5 @@
 from .consts import SYM_NOTHING, SYM_GOOD, SYM_BAD
-from .df import count_true
-from .seq import is_empty
+from .seq import count_true, is_empty
 
 
 def print_outcome(state, units):
diff --git a/utils/seq.py b/utils/seq.py
index f8df990..c42cd43 100644
--- a/utils/seq.py
+++ b/utils/seq.py
@@ -1,5 +1,13 @@
+import numpy as np
+
+
+def count_true(seq):
+    bools = np.asanyarray(seq, dtype=bool)
+    return np.count_nonzero(bools)
+
 
 def is_empty(seq):
     return len(seq) == 0
 
 
+