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program 1
import pandas as pd
df=pd.read_excel("E://mypandas/employee.xlsx")
# df=df.fillna(0)
# print(df)
# print("Before Drop")
# print(df)
# df=df.dropna()
# print("After Drop")
# print("--------------------------------")
# print(df)
print(df[['empname','HRA']].fillna(0))