operator.itemgetter() 在这段代码中是如何工作的？

Question

csv1 = csv.reader(scoreboard, delimiter=",")
sort = sorted(csv1, key=operator.itemgetter(0), reverse = True) 

for x in sort[:6]:
    print(x)

I am hoping someone can explain to me what's happening in the above code.

Answer 1

On first line you're oreading a comma separated file (.csv). It will probably be a table or something similar.

On the second line you're sorting it based on the first element in descending order (biggest values first). That means that you are sorting the table considering the first column.

On the for loop you print the first 6 elements of the sorted array