如何从 Python 中的文本文档中枚举和排序列表

How to enumerate and sort a list from a text document in Python

我正在尝试使用文本文档枚举 python 中的列表。我已读入文档,但似乎无法对它们进行排序或枚举。目标是调用他们完成比赛的时间,对它们进行排序,然后按完成顺序枚举它们。

输出总是: (['18:44'],生成器对象枚举在 0x0000000003143630) 我不确定它为什么说 "generator object enumerate at 0x0000000003143630" 或如何枚举排序列表。

def get_sec(time_str):
    h, m = time_str.split(':')
    return int(h) * 3600 + int(m) * 60
def enumerate(sequence, start=0):
    n = start
    for elem in sequence:
        yield n, elem
        n += 1
with open("Race_Results_Sample.txt", "r")as myList:
    myList = myList.read()
    myList = [l.split(",") for l in myList.splitlines()]
    myList = sorted(myList, key=lambda kv: kv[1])
for line in myList:
    num, last, org, time = line
    place = []
    place.append(time)
    placenum = enumerate(sorted(place))
    print(place, placenum)
for line in myList:
    num, last, org, time = line
    new_time = get_sec(time)
    mile = round((((new_time/ 3.10686)/60)/60), 3)
    mile = str(mile)
    print ('{:<20s}{:<5s}{:<5s}{:<7s}{:<10s}'.format(last, num, org, time, mile))

第一个 "for line in myList" 只是一个测试,看看它如何独立运行。我最终会将它放在第二个 "for line in myList" 部分,以进一步清理代码。在此先感谢您的帮助。

这是当前输出

(['18:44'], generator object enumerate at 0x0000000003143630>)
(['18:23'], generator object enumerate at 0x0000000003143678>)
(['18:28'], generator object enumerate at 0x0000000003143630>)
(['18:36'], generator object enumerate at 0x0000000003143678>)
(['19:05'], generator object enumerate at 0x0000000003143630>)
(['19:10'], generator object enumerate at 0x0000000003143678>)
(['18:22'], generator object enumerate at 0x0000000003143630>)
(['18:03'], generator object enumerate at 0x0000000003143678>)
(['18:49'], generator object enumerate at 0x0000000003143630>)
(['19:01'], generator object enumerate at 0x0000000003143678>)
(['18:33'], generator object enumerate at 0x0000000003143630>)
(['18:45'], generator object enumerate at 0x0000000003143678>)
(['18:55'], generator object enumerate at 0x0000000003143630>)
(['18:58'], generator object enumerate at 0x0000000003143678>)
(['18:09'], generator object enumerate at 0x0000000003143630>)

进程已完成,退出代码为 0

enumerate 不是 return 列表,而是一种特殊的生成器。写

placenum = list(enumerate(sorted(place)))

并且您的程序的行为将更有意义。或者,您可以在 for 循环中直接使用(使用)对 enumerate() 的调用,就像它是一个列表一样。例如

for rank, value in enumerate(sorted(place)):
    print(rank, value)