I found another answer here, but it did not work. Any help would be greatly appreciated.

In this assignment, you are going to implement a natural join operation using mrjob. The natural join operation takes on two input files shown as follows. Mary James, 7001234567,22,CS Peter Pan,7009998888,20,Cyber Security Micky Mouse,7001112222,19,CS John Smith, 7004545454,25, Game Development Bob Don, 7005555222,32,Software Design Compiler, A, 7001234567 Compiler, B,7009998888 Algorithm, B, 7009998888 Algorithm, C,7001112222 Big Data, A,7001234567 Game Programming, C,7009998888 Data Structure, A,7009998888 Android Programming, B,7001112222 Big Data, C,7003456123 Big Data, B, 7009998888 Programming Language, B, 7001234567 Programming Language, A, 7001112222 For an example on how the natural join operation works refers to our lecture slides. To test the code, use the following command >>python MRNaturalJoin.py names.txt grades.txt > output.txt The expected results should look like the following: "7001112222" [["Micky Mouse", "19", "CS"), ["Algorithm", "C"]] "7001112222" [["Micky Mouse", "19", "CS"], ["Android Programming", "B"]] "7001112222" [["Micky Mouse", "19", "CS"], ["Programming Language", "A"]] "7001234567" [["Mary James", "22", "CS"), ["Big Data","A"]] "7001234567" [["Mary James", "22", "CS"], ["Compiler", "A"]] "7001234567" [["Mary James", "22", "CS"), ["Programming Language", "B"]] "7009998888" [["Peter Pan", "20", "Cyber Security"], ["Algorithm", "B"]] "7009998888" [["Peter Pan", "20", "Cyber Security"], ["Big Data", "B"]] "7009998888" [["Peter Pan", "20", "Cyber Security"], ["Compiler", "B"]] "7009998888" [["Peter Pan", "20", "Cyber Security"], ["Data Structure", "A"]] "7009998888" [["Peter Pan", "20", "Cyber Security"],["Game Programming", "C"]]