pd.DataFrame

import pandas as pd
data={
    "calories":[420,380,390],
    "duration":[50,40,45]
}
df=pd.DataFrame(data)
print(df)

print('\n')

#refer to the row index
print(df.loc[0])
print('\n')
#return row 0 and 1
print(df.loc[[0,1]])

print('\n')

df=pd.DataFrame(data,index=["day1","day2","day3"])
print(df)