如何使用 for 循环填充字典值？

Question

我有三个列表，每个列表都包含员工的唯一 ID。例如，

bug = [1,2,3,4,4,4,4,4,5,6,7,8,8,8]
task = [1,1,1,1,2,9]
subtask = [10, 11, 11, 11, 8, 8, 8, 8 ,8 , 8, 6]

员工ID的参考次数显示，员工解决了多少问题。例如，ID=1 的员工解决了 1 个 bug、4 个任务和 0 个子任务。我想创建一个字典，它具有下一个结构：键是员工的 ID，值是大小为 3 的列表，列表的每个值显示有多少错误、任务和子任务员工 ID = 已解决。例如，就我而言，我必须获取下一个字典：

all_employees = {1:[1, 4, 0], 2:[1, 1, 0], 3:[1, 0, 0], 4:[5, 0, 0], 5:[1, 0, 0], 6:[1, 0, 1], \
                 7:[1, 0, 1], 8:[3, 0, 6], 9:[0, 1, 0], 10:[0, 0, 1], 11:[0, 0, 3]} 

这是我的代码：

from collections import defaultdict, Counter
bug = [1,2,3,4,4,4,4,4,5,6,7,8,8,8]
task = [1,1,1,1,2,9]
subtask = [10, 11, 11, 11, 8, 8, 8, 8 ,8 , 8, 6]
all_issues = bug + task + subtask
all_emlpoyees = dict.fromkeys(all_issues, [0, 0, 0])    
bug_d = dict(Counter(bug))
task_d = dict(Counter(task))
subtask_d = dict(Counter(subtask))
for i in all_employees.keys():
    try:
        print("value = ", bug_d[i])
        print ("key = ", i)

        all_employees[i][0] = bug_d[i]
    except Exception as e:
        pass
print (all_assignees)

在我看来，这段代码应该产生与上面提到的相同的字典，但它的列表中只有一个，第一个，非零值，但我的输出看起来像：

{1: [3, 0, 0], 2: [3, 0, 0], 3: [3, 0, 0], 4: [3, 0, 0], 5: [3, 0, 0], 6: [3, 0, 0], 7: [3, 0, 0], 8: [3, 0, 0], 9: [3, 0, 0], 10: [3, 0, 0], 11: [3, 0, 0]}

尽管 for 循环中的两次打印显示了正确的值。 任何想法，我做错了什么？

感谢帮助，问题已解决。

Answer 1

这是一行代码：

bug = [1,2,3,4,4,4,4,4,5,6,7,8,8,8]
task = [1,1,1,1,2,9]
subtask = [10, 11, 11, 11, 8, 8, 8, 8 ,8 , 8, 6]

{i:[bug.count(i), task.count(i), subtask.count(i)] for i in set(bug+task+subtask)}

Out[1]:
{1: [1, 4, 0],
 2: [1, 1, 0],
 3: [1, 0, 0],
 4: [5, 0, 0],
 5: [1, 0, 0],
 6: [1, 0, 1],
 7: [1, 0, 0],
 8: [3, 0, 6],
 9: [0, 1, 0],
10: [0, 0, 1],
11: [0, 0, 3]}

和使用循环一样：

for i in set(bug+task+subtask):
    a[i] = [bug.count(i), task.count(i), subtask.count(i)]

print(a)

Answer 2

您可以先将列表映射为Counter 的列表，这样您就可以通过遍历一组所有键来创建所需的字典：

counts = list(map(Counter, (bug, task, subtask)))
all_employees = {id: [c[id] for c in counts] for id in {id for c in counts for id in c}}

all_employees 变为：

{1: [1, 4, 0], 2: [1, 1, 0], 3: [1, 0, 0], 4: [5, 0, 0], 5: [1, 0, 0], 6: [1, 0, 1], 7: [1, 0, 0], 8: [3, 0, 6], 9: [0, 1, 0], 10: [0, 0, 1], 11: [0, 0, 3]}

Answer 3

可以使用以下代码实现所需的输出。

bug = [1, 2, 3, 4, 4, 4, 4, 4, 5, 6, 7, 8, 8, 8]
task = [1, 1, 1, 1, 2, 9]
subtask = [10, 11, 11, 11, 8, 8, 8, 8, 8, 8, 6]

# first create a set of all employee id , no repeats
all_employees = set(bug + task + subtask)

# loop over each id and find the count of bug, task, sub_task and append it in the dict
final_dict = {}
for id in all_employees:
    final_dict[id] = [bug.count(id), task.count(id), subtask.count(id)]

print(final_dict)

输出：

{1: [1, 4, 0], 2: [1, 1, 0], 3: [1, 0, 0], 4: [5, 0, 0], 5: [1, 0, 0], 6: [1, 0, 1], 7: [1, 0, 0], 8: [3, 0, 6], 9: [0, 1, 0], 10: [0, 0, 1], 11: [0, 0, 3]}

Answer 4

您可以使用Counter 从每个列表中计数，然后创建字典。
这避免了计算每个员工的任务数量。

>>> c1, c2, c3 = Counter(bug), Counter(task), Counter(subtask) 
>>> d={}
>>> for employee in set(c1)|set(c2)|set(c3):
...     d[employee] = [c1[employee], c2[employee], c3[employee]]
... 
>>> d
{1: [1, 4, 0], 2: [1, 1, 0], 3: [1, 0, 0], 4: [5, 0, 0], 5: [1, 0, 0], 6: [1, 0, 1], 7: [1, 0, 0], 8: [3, 0, 6], 9: [0, 1, 0], 10: [0, 0, 1], 11: [0, 0, 3]}