reduce memory usage

1 files changed, 2 insertions, 0 deletions

diff --git a/utils/chi2 b/utils/chi2
index 4c1309b..fec97a7 100755
--- a/utils/chi2
+++ b/utils/chi2
@@ -559,6 +559,8 @@ if __name__ == '__main__':
     # Carlo.
     weights = pd.merge(weights,mcpl[['run','evn','unique_id']],on=['run','evn'],how='left')
 
+    del weights['evn']
+
     # There are a handful of weights which turn out to be slightly negative for
     # some reason. For example:
     #