Python中的数据分组

我有以下（空格分隔的）输入：

我希望实现以下管道分隔输出： （其中列为[日期和名称、NUM条目、最后一列的总和]）

这是我目前的代码：

s = open("output.txt","r")
fn=s.readlines()
d = {}
for line in fn:
 parts = line.split()
 if parts[0] in d:
   d[parts[0]][1] += int(parts[2])
   d[parts[0]][2] += 1
 else:
d[parts[0]] = [parts[1], int(parts[2]), 1]
for date in sorted(d):
   print "%s %s|%d|%d" % (date, d[date][0], d[date][2], d[date][1])

我得到的输出为：

2012-10-06 PETER|2|70

而不是

2012-10-06 PETER|1|60

而且

TOM

没有显示在列表中

---

我需要做什么来更正我的代码？

什么与当前代码不兼容？

2012-10-06 PETER|2|70

2012-10-06 PETER|1|60

import itertools
with open('output.txt', 'r') as f:
    splitlines = (line.split() for line in f if line.strip())
    for (date, name), bits in itertools.groupby(splitlines, key=lambda bits: bits[:2]):
        total = 0
        count = 0
        for _, _, val in bits:
            total += int(val)
            count += 1
        print '%s %s|%d|%d' % (date, name, count, total)

d = {}
with open('output.txt', 'r') as f:
    for line in f:
        date, name, val = line.split()
        key = (date, name)
        if key not in d:
            d[key] = [0, 0]
        d[key][0] += int(val)
        d[key][1] += 1

for key in sorted(d):
    date, name = key
    total, count = d[key]
    print '%s %s|%d|%d' % (date, name, count, total)

d = collections.defaultdict(list)
with open('output.txt', 'r') as f:
    for line in f:
        date, name, val = line.split()
        d[date, name].append(int(val))

for (date, name), vals in sorted(d.items()):
    print '%s %s|%d|%d' % (date, name, len(vals), sum(vals))