在数据结构

  • Z时代
  • 2024-01-10
  • 分类：问答

变换列表我想知道它有可能创建一个转换此列表的功能：在数据结构

['music\n', ' extension=mp3\n', '\n', 'reports/INFOB131\n', ' extension=doc,docx,pdf\n', ' name_contains=INFOB131\n', ' max_size=100000\n', '\n', 'reports/INFOB132\n', ' extension=doc,docx,pdf\n', ' name_contains=INFOB132\n', ' max_size=100000\n', '\n', 'games\n', ' name_contains=SC2,Wesnoth\n', '\n', 'pictures/Namur\n', ' extension=jpeg\n', ' min_size=5000000\n', ' name_contains=cercle\n', '\n', 'pictures/autres\n', ' extension=jpeg\n', ' min_size=5000000']

已经从使用readlines方法（）函数的文本文件得到。

到数据结构像这样的：

data_config = [{'music' : {'extension':'mp3'}}, {'reports/INFOB131': {'extension': ['doc', 'docx','pdf'], 'name_contains':'INFOB131', 'max_size':100000}}, {'reports/INFOB132': {'extension': ['doc', 'docx','pdf'], 'name_contains':'INFOB132', 'max_size':100000}}]

我开始通过这些过程，以清理名单：

new_lines = [] 
for i in lines : 
    new_lines.append(str.strip(i, '\n')) 
for i in new_lines: 
    if i == '': 
    new_lines.remove(i)

我得到这样的：

['music', ' extension=mp3', 'reports/INFOB131', ' extension=doc,docx,pdf', ' name_contains=INFOB131', ' max_size=100000', 'reports/INFOB132', ' extension=doc,docx,pdf', ' name_contains=INFOB132', ' max_size=100000', 'games', ' name_contains=SC2,Wesnoth', 'pictures/Namur', ' extension=jpeg', ' min_size=5000000', ' name_contains=cercle', 'pictures/autres', ' extension=jpeg', ' min_size=5000000']

接下来，理论上我有这样的想法：

创建一个将在列表中浏览的函数，如果“=”不在列表的元素中，则将其定义为变量k。否则，该列表的元素将被添加到列表名为pre_list和直到另外一个元素没有“=”，在没有遇到过，这pre_list进行更新，然后当新元素“=”，在它遇到一个字典containig变量键作为列表，pre_list是分配给该键的元素。

def my_function(list_in_question, my_config_list =[]): 
""" """ 
for i in list_in_question : 
    #it misses the first if for the situation in which the function stops 
    if not '=' in i: 
     my_config_list.append({key:pre_list}) 
     i = key 
     pre_dict = {key:{}} 
    else: 
     pre_dict[key][i.split('=')[0]] = i.split('=')[1] 
     return myfunction(list_in_question[list_in_question.index(i):])

我想以递归的方式创建它。我有问题。其中之一是，我不知道我将如何阻止它...

回答：

问题比我预期的更复杂。
现在很难解释所有的代码。
它适用于当前数据，但我不确定它是否可以与其他数据一起使用。

data = ['music\n', ' extension=mp3\n', '\n', 'reports/INFOB131\n', ' extension=doc,docx,pdf\n', ' name_contains=INFOB131\n', ' max_size=100000\n', '\n', 'reports/INFOB132\n', ' extension=doc,docx,pdf\n', ' name_contains=INFOB132\n', ' max_size=100000\n', '\n', 'games\n', ' name_contains=SC2,Wesnoth\n', '\n', 'pictures/Namur\n', ' extension=jpeg\n', ' min_size=5000000\n', ' name_contains=cercle\n', '\n', 'pictures/autres\n', ' extension=jpeg\n', ' min_size=5000000'] 
config_list_2 = [] 
# variable for dictionary 
prev_ext = None 
curr_ext = '' 
prev_list = list() 
prev_dict = dict() 
for item in data: 
    # remove spaces, tabs and '\n' 
    item = item.strip() 
    # create dictionary and sometimes new sublist 
    if not item: 
     if (prev_ext is not None) and curr_ext != prev_ext: 
      config_list_2.append(prev_list) 
      prev_list = list() 
     prev_list.append(prev_dict) 
     prev_dict = dict() 
     prev_ext = curr_ext 
     curr_ext = '' 
    # work only with elements `key=value` 
    if '=' in item: 
     # split `key=value` 
     key, value = item.split('=') 
     # if value has `,` then it is list of values 
     if ',' in value: 
      value = value.split(',') 
     # if you get `extension then you have start new dictionary 
     if key == 'extension': 
      curr_ext = value 
     # some values have to be converted to int() 
     if key in ('max_size', 'min_size'): 
      value = int(value) 
     # add to current dictionary 
     prev_dict[key] = value 
# add last dictionary 
if (prev_ext is not None) and curr_ext != prev_ext: 
    config_list_2.append(prev_list) 
    prev_list = list() 
prev_list.append(prev_dict) 
# add last sublist 
config_list_2.append(prev_list) 
# --- print result --- 
print(config_list_2) 
# --- compare with expected result -- 
expected = [[{'extension' : 'mp3'}], [{'extension':['doc','docx', 'pdf'], 'name_contains':'INFOB131', 'max_size':100000}, {'extension':['doc','docx', 'pdf'], 'name_contains':'INFOB132', 'max_size':100000}],[{'name_contains':['SC2','Wesnoth']}],[{'extension':'jpeg', 'min_size':5000000, 'name_contains':'cercle'}, {'extension':'jpeg', 'min_size':5000000}]] 
print(config_list_2 == expected) # True

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