altair hexbin

webapp/app.py

@@ -6,6 +6,9 @@ import pyvo as vo
 import pandas as pd
 import matplotlib as mpl
 
+import plotly.express as px
+import seaborn as sns
+from scipy.stats import norm
 
 @st.cache
 def get_data_sql(Nstars=1000):    
@@ -44,15 +47,8 @@ def get_data_sql(Nstars=1000):
     return df
     
 
-import streamlit as st
 # To make things easier later, we're also importing numpy and pandas for
 # working with sample data.
-import numpy as np
-import pandas as pd
-import plotly.express as px
-import matplotlib.pyplot as plt
-import seaborn as sns
-from scipy.stats import norm
 
 
 cols=[