from pandas.core.frame import DataFrame from printheader import print_header # <1> dataset1 = np.arange(9.).reshape((3, 3)) # <2> df1 = DataFrame( # <3> dataset1, columns=['apple', 'banana', 'mango'], index=['orange', 'purple', 'blue']) dataset2 = np.arange(12.).reshape((4, 3)) # <2> df2 = DataFrame( # <3> dataset2, columns=['apple', 'banana', 'kiwi'], index=['orange', 'purple', 'blue', 'brown']) print_header('df1') print(df1) # <4> print() print_header('df2') print(df2) # <4> print() print_header('df1 + df2') print(df1 + df2) # <5> print_header('df1.add(df2, fill_value=0)') print(df1.add(df2, fill_value=0)) # <6>