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@@ -0,0 +1,25 @@
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+#! /usr/bin/env python3
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+# playing with group and count
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+
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+# https://stackoverflow.com/questions/38174155/group-dataframe-and-get-sum-and-count
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+
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+
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+import pandas as pd
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+data = {
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+ 'Company' : ['Ford','Ford','Ford','Ford','Chevy','Chevy'],
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+ 'Type' : ['Mercury','Lincoln','Lincoln','Econoline','Malabu','Pickups'],
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+ 'Profit' : [1,100,40,99,2,3]
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+}
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+df = pd.DataFrame(data)
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+
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+# Want to compute mean and std of Profit
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+# Add duplicates of value to be aggrigated
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+df['mean_profit'] = df["Profit"]
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+df['std_profit'] = df["Profit"]
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+
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+df2 = df.groupby('Company').agg({'Type':'count','Profit':'sum', 'mean_profit':'mean','std_profit':'std'}).reset_index().rename(columns={'Type':"count"})
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+print(df2)
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+
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+# Company count Profit mean_profit std_profit
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+# 0 Chevy 2 5 2.5 0.707107
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+# 1 Ford 4 240 60.0 48.311489
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