--- a
+++ b/helpers/randomundersampler.py
@@ -0,0 +1,30 @@
+import sys
+import pandas as pd
+from imblearn.under_sampling import RandomUnderSampler
+
+
+def resample_data(t):
+    t = t[['text', 'readm_30d']]
+    label = t.pop('readm_30d')
+
+    rus = RandomUnderSampler(random_state=42)
+    X, y = rus.fit_resample(t, label.astype('category'))
+
+    df = pd.DataFrame(X[:, 0])
+    df.columns = ['text']
+    df['readm_30d'] = pd.Series(y)
+
+    return df
+
+
+if __name__ == '__main__':
+    input_file = args = sys.argv[1]
+    output_file = args = sys.argv[2]
+
+    df = pd.read_csv(input_file)
+
+    df = resample_data(df)
+
+    print("new shape: {}".format(df.shape))
+
+    df.to_csv(output_file)