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将字典列表拆分为常用元素的字典

dictionary list python

Mormoran · 技术社区 · 6 年前

这个问题有点难以用标题来解释。

dict_list = [{"PROCESS": "Etch"},{"PROCESS": "Etch"},{"PROCESS": "Etch"},
             {"PROCESS": "Etch"},{"PROCESS": "Etch"},{"PROCESS": "Etch"},
             {"PROCESS": "Etch"},{"PROCESS": "Etch"},{"PROCESS": "Etch"},
             {"PROCESS": "Etch"},{"PROCESS": "Etch"},{"PROCESS": "Etch"},
             {"PROCESS": "Etch"},{"PROCESS": "Etch"},{"PROCESS": "Etch"},
             {"PROCESS": "Depo"},{"PROCESS": "Depo"},{"PROCESS": "Depo"},
             {"PROCESS": "Depo"},{"PROCESS": "Depo"},{"PROCESS": "Depo"},
             {"PROCESS": "Depo"},{"PROCESS": "Depo"},{"PROCESS": "Depo"},
             {"PROCESS": "Depo"},{"PROCESS": "Depo"},{"PROCESS": "Depo"},
             {"PROCESS": "Depo"},{"PROCESS": "Depo"},{"PROCESS": "Depo"},
             {"PROCESS": "Etch"},{"PROCESS": "Etch"},{"PROCESS": "Etch"},
             {"PROCESS": "Etch"},{"PROCESS": "Etch"}]

基本上,如果我循环 dict_list ,逐行打印每个“进程”,如下所示:

>>"Etch"
>>"Etch"
>>"Etch"
>>"Etch"
>>"Depo"
>>"Depo"
>>"Depo"
>>"Depo"
>>"Etch"
>>"Etch"
>>"Etch"
>>"Etch"
>>"Depo"
>>"Depo"
>>"Depo"
>>"Depo"

在这个例子中,我有4个“runs”字典,每个字典都有4个字典列表。

我需要把它们分类成列表,然后再分类成这样的字典:

new_dict_list = {
    "run 1": [{"PROCESS": "Etch"},{"PROCESS": "Etch"},{"PROCESS": "Etch"},{"PROCESS": "Etch"},{"PROCESS": "Etch"},{"PROCESS": "Etch"},{"PROCESS": "Etch"},{"PROCESS": "Etch"},{"PROCESS": "Etch"},{"PROCESS": "Etch"},{"PROCESS": "Etch"},{"PROCESS": "Etch"},{"PROCESS": "Etch"},{"PROCESS": "Etch"},{"PROCESS": "Etch"}],
    "run 2": [{"PROCESS": "Depo"},{"PROCESS": "Depo"},{"PROCESS": "Depo"},{"PROCESS": "Depo"},{"PROCESS": "Depo"},{"PROCESS": "Depo"},{"PROCESS": "Depo"},{"PROCESS": "Depo"},{"PROCESS": "Depo"},{"PROCESS": "Depo"},{"PROCESS": "Depo"},{"PROCESS": "Depo"},{"PROCESS": "Depo"},{"PROCESS": "Depo"},{"PROCESS": "Depo"}],
    "run 3": [{"PROCESS": "Etch"},{"PROCESS": "Etch"},{"PROCESS": "Etch"},{"PROCESS": "Etch"},{"PROCESS": "Etch"}]
}

可能是这样的:

在每本字典上迭代
把第一本字典放在一个列表里, 把这个单子编入一本新字典(我们称之为跑步)
在下一次迭代中,如果dictionary[“process”]相同,则存储它在同一个列表和同一个字典中
如果字典[“进程”]更改,则将当前字典存储在新列表,然后放入新词典

我只是不知道如何把它放到python逻辑中。我对这件事还不太熟悉。

这就是我目前所拥有的:

prev_process = ""
counter = 0
new_dict_list = {}

for dictionary in dict_list:
  if dictionary["PROCESS"] != prev_process:
    counter += 1
    prev_process = dictionary["PROCESS"]
  new_dict_list["run " + counter] = dictionary

我觉得应该有一个while循环,“虽然dictionary[“process”]保持不变,但我不知道如何将其放入python中,或者如何中断(因为如果我像现在这样检查,条件总是正确的)。

1 回复 | 直到 6 年前

Ajax1234 6 年前

你可以用 itertools.groupby :

import itertools
dict_list = [{"PROCESS": "Etch"},{"PROCESS": "Etch"},{"PROCESS": "Etch"},{"PROCESS": "Etch"},{"PROCESS": "Etch"},{"PROCESS": "Etch"},{"PROCESS": "Etch"},{"PROCESS": "Etch"},{"PROCESS": "Etch"},{"PROCESS": "Etch"},{"PROCESS": "Etch"},{"PROCESS": "Etch"},{"PROCESS": "Etch"},{"PROCESS": "Etch"},{"PROCESS": "Etch"},{"PROCESS": "Depo"},{"PROCESS": "Depo"},{"PROCESS": "Depo"},{"PROCESS": "Depo"},{"PROCESS": "Depo"},{"PROCESS": "Depo"},{"PROCESS": "Depo"},{"PROCESS": "Depo"},{"PROCESS": "Depo"},{"PROCESS": "Depo"},{"PROCESS": "Depo"},{"PROCESS": "Depo"},{"PROCESS": "Depo"},{"PROCESS": "Depo"},{"PROCESS": "Depo"},{"PROCESS": "Etch"},{"PROCESS": "Etch"},{"PROCESS": "Etch"},{"PROCESS": "Etch"},{"PROCESS": "Etch"}]
new_d = {'run {}'.format(i):list(b) for i, [_, b] in enumerate(itertools.groupby(dict_list, key=lambda x:x["PROCESS"]), 1)}

输出:

{'run 1': [{'PROCESS': 'Etch'}, {'PROCESS': 'Etch'}, {'PROCESS': 'Etch'}, {'PROCESS': 'Etch'}, {'PROCESS': 'Etch'}, {'PROCESS': 'Etch'}, {'PROCESS': 'Etch'}, {'PROCESS': 'Etch'}, {'PROCESS': 'Etch'}, {'PROCESS': 'Etch'}, {'PROCESS': 'Etch'}, {'PROCESS': 'Etch'}, {'PROCESS': 'Etch'}, {'PROCESS': 'Etch'}, {'PROCESS': 'Etch'}], 
 'run 2': [{'PROCESS': 'Depo'}, {'PROCESS': 'Depo'}, {'PROCESS': 'Depo'}, {'PROCESS': 'Depo'}, {'PROCESS': 'Depo'}, {'PROCESS': 'Depo'}, {'PROCESS': 'Depo'}, {'PROCESS': 'Depo'}, {'PROCESS': 'Depo'}, {'PROCESS': 'Depo'}, {'PROCESS': 'Depo'}, {'PROCESS': 'Depo'}, {'PROCESS': 'Depo'}, {'PROCESS': 'Depo'}, {'PROCESS': 'Depo'}], 
 'run 3': [{'PROCESS': 'Etch'}, {'PROCESS': 'Etch'}, {'PROCESS': 'Etch'}, {'PROCESS': 'Etch'}, {'PROCESS': 'Etch'}]
}

itertools.groupby网站 基于单个键对数据进行分类。在本例中,数据围绕 'PROCESS' 'run {number}' enumerate 用于以干净的方式跟踪当前迭代索引。