Practice #11 Boolean indexing

import pandas as pd

df = pd.read_excel("E12EXAMPLE.xlsx")
df.head(3)

	Name	Subject	Phone
0	Louis	Korean	010-6138-6625
1	Harvey	Japanese	010-2901-3320
2	G-dragon	Chinese	010-5132-3850

pdf = df.pivot_table("Name", index="Subject", aggfunc="count")
pdf
a1 = pdf.loc[pdf["Name"]<10].index
df.loc[df["Subject"].isin(a1)].to_clipboard(index=False)