Update app.py

app.py

@@ -8,6 +8,7 @@ import matplotlib.pyplot as plt
 from matplotlib.ticker import FormatStrFormatter
 import seaborn as sns
 from sklearn import linear_model
+from plotly.subplots import make_subplots
 data = pd.read_excel("NIAD.xlsx")
 df=pd.DataFrame(data)
 df=df.fillna('--')