[英]How to read from a txt file into a dictionary where the value is a nested dictionary and the key of the nested dictionary is given by me?
我正在尝试将以下 txt 文件加载到字典中:
['A'] (4)
['B'] (4)
['E'] (4)
['C'] (4)
['A', 'B'] (3)
['A', 'E'] (3)
['A', 'C'] (3)
['B', 'E'] (4)
['B', 'C'] (3)
['C', 'E'] (3)
['A','B','E'] (3)
['B', 'C', 'E'] (3)
我希望字典看起来像这样:
itemsets={ A:{"support_count":4},B:{"support_count":4},E:{"support_count":4},C:{"support_count":4},AB:{"support_count":3},AE:{"support_count":3},AC:{"support_count":3},BE:{"support_count":4},BC:{"support_count":3},CE:{"support_count":3},ABE:{"support_count":3},BCE:{support_count:3}}
这是我到目前为止所拥有的:
keys=[]
values=[]
with open(filename, 'r') as f:
lines = f.readlines()
keys = [line[:line.find(']')] for line in lines]
keys = [k.replace('[', '').replace(']', '').replace(',','').replace("'",'').replace(' ','') for k in keys]
values= [line[line.find('('):] for line in lines]
values = [v.replace('(', '').replace(')', '').replace("'",'').replace("\n",'') for v in values]
itemsets = dict.fromkeys(keys)
for v in values:
for item in itemsets.keys():
d[item]={"support_count": v}
return itemsets
这是我运行它时得到的:
{'A': {'support_count': '3'}, 'B': {'support_count': '3'}, 'E': {'support_count': '3'}, 'C': {'support_count': '3'}, 'AB': {'support_count': '3'}, 'AE': {'support_count': '3'}, 'AC': {'support_count': '3'}, 'BE': {'support_count': '3'}, 'BC': {'support_count': '3'}, 'CE': {'support_count': '3'}, 'ABE': {'support_count': '3'}, 'BCE': {'support_count': '3'}}
当您迭代values
时,您会继续用下一个覆盖 dict 值,最后一个是3
,您需要同时迭代这两个值: zip
for k, v in zip(keys, values):
d[k] = {"support_count": int(v)}
要解析数据,我建议使用正则表达式方法
\[(.*)] \((\d+)
解析每一行:键和值[^AZ]
从键中删除非字母import re
lines = ["['A'] (4)", "['B'] (4)", "['E'] (4)", "['C'] (4)", "['A', 'B'] (3)",
"['A', 'E'] (3)", "['A', 'C'] (3)", "['B','E'] (4)", "['B', 'C'] (3)",
"['C', 'E'] (3)", "['A','B', 'E'] (3)", "['B', 'C', 'E'] (3)"]
d = {}
ptn_all = re.compile(r"\[(.*)] \((\d+)")
ptn_key = re.compile("[^A-Z]")
for line in lines:
keys, value = ptn_all.search(line).groups()
d[ptn_key.sub("", keys)] = {"support_count": int(value)}
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