Python打印字符串结果

Question

import operator

def mkEntry(file1):
    results = []
    for line in file1:
        lst = line.rstrip().split(",")
        lst[2] = int(lst[2])
        results.append(lst)
    return print(sorted(results, key=operator.itemgetter(1,2)))


def main():
    openFile = 'names/' + 'yob' + input("Enter the Year: ") + '.txt'
    file1 = open(openFile)
    mkEntry(file1)

main()

File:

Emily,F,25021
Emma,F,21595
Madison,F,20612
Olivia,F,16100
Joaquin,M,711
Maurice,M,711
Kade,M,701
Rodrigo,M,700
Tate,M,699

How do I print out the result looks like this: 1. Name (Gender): Numbers Instead of ['name', 'gender', numbers]

I have trouble doing the string thing. It won't give me the good output. Any help?

Thanks

Answer 1

return print(sorted(results, key=operator.itemgetter(1,2))) isn't doing what you'd expect it to.

Because print() returns None , your function will return None . Get rid of the print statement (if you want to print the line, just put it before the return)

Then you can do in your main() function:

for person in mkEntry(file1):
    print("1. {0} ({1}): {2}".format(*person))