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-rw-r--r--wqflask/wqflask/heatmap/heatmap.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/wqflask/wqflask/heatmap/heatmap.py b/wqflask/wqflask/heatmap/heatmap.py
index 28c5ce12..37454dfb 100644
--- a/wqflask/wqflask/heatmap/heatmap.py
+++ b/wqflask/wqflask/heatmap/heatmap.py
@@ -127,7 +127,7 @@ class Heatmap(object):
             trimmed_values = []
             for i in range(0, len(samples)):
                 if samples[i] in self.dataset.group.samplelist:
-                    trimmed_samples.append(samples[i])
+                    trimmed_samples.append(str(samples[i]))
                     trimmed_values.append(values[i])
 
             reaper_results = genotype.regression(strains = trimmed_samples,