创建一个python字典，containig文件的地址作为键，内容作为其值？

Question

我到目前为止所拥有的代码：

import os
import xlrd
import re
import sys  
from collections import OrderedDict
import json


reload(sys)  
sys.setdefaultencoding('utf-8')
#####the keyword should be "ab_"

rootdir = 'C:\Users\'

variable_count = 1

name = re.compile('ab_')
excel_files = []

for subdir, dirs, files in os.walk(rootdir):
    for file in files:
        if ".xlsx" in file:
            excel_files.append(os.path.join(subdir, file)) #list of excel files

variables_list = []
s = [] 
dict_files = {}
dict_variables = {}
for items in excel_files:
    for sh in xlrd.open_workbook(items).sheets():  
        for row in range(sh.nrows):
            for col in range(sh.ncols):
                myCell = sh.cell(row, col)
                if name.search(str(myCell.value)):
                    excel_keyword = []
                    excel_keyword.append(items)
                    dict_files[items] = None
for keys in dict_files:
    for sh in xlrd.open_workbook(keys).sheets():  
        for row in range(sh.nrows):
            for col in range(sh.ncols):
                myCell = sh.cell(row, col)
                if name.search(str(myCell.value)):
                    dict_variables[variable_count] = str(myCell.value)
                    variable_count += 1
                    dict_files[keys] = dict_variables



                        #print dict_variables.values()
                    #print dict_files


f = open(r"Results_variables.json", "w")
json.dump(dict_files, f, indent=3, sort_keys=True)              ###indent and sort_keys for pretty printing###
f.close()`

但是，此代码查找所有Excel地址和包含“ ab_”的单元格值，并将找到的所有单元格值附加到每个键上。我需要在每个密钥后面附加的只是在该密钥地址中包含“ ab_”的单元格。

当前输出：

{

 "C:\\Users\\house_1.xlsx":
    1: "ab_blue"
    2: "ab_red"
    3: "ab_white"
    4: "ab_yellow"
    5: "ab_purple"
 "C:\\Users\\house_1.xlsx":
    1: "ab_blue"
    2: "ab_red"
    3: "ab_white"
    4: "ab_yellow"
    5: "ab_purple"
 "C:\\Users\\house_1.xlsx":
    1: "ab_blue"
    2: "ab_red"
    3: "ab_white"
    4: "ab_yellow"
    5: "ab_purple"
 "C:\\Users\\house_1.xlsx":
    1: "ab_blue"
    2: "ab_red"
    3: "ab_white"
    4: "ab_yellow"
    5: "ab_purple"

}

预期输出：

{

 "C:\\Users\\house_1.xlsx":
    1: "ab_blue"
 "C:\\Users\\house_1.xlsx":
    1: "ab_red"
 "C:\\Users\\house_1.xlsx":
    1: "ab_white"
 "C:\\Users\\house_1.xlsx":
    1: "ab_yellow"
    2: "ab_purple"

}