CommonChar pins Category General
CommonChar pins Contact Mark
CommonChar pins Description 1st line
CommonChar pins Description 2nd line
CommonChar nails Category specific
CommonChar nails Description 1st line

mainDict={}
for dirName, subdirList, fileList in os.walk(sys.argv[1]):
    for eachFile in fileList:
        #excluding file names ending in .swp , swo which are creatied temporarily when editing in vim
        if not eachFile.endswith(('.swp','.swo','~')):
            #print eachFile
            filePath= os.path.join(dirName,eachFile)
        #print filePath
            with open(filePath, "r") as fh:
                contents=fh.read()
            items=re.findall("CommonChar.*$",contents,re.MULTILINE)
            for x in items:
        cc, group, topic, data = x.split(None, 3)
                data = data.split()
                group_dict = mainDict.setdefault(group, {'fileLocation': [filePath]})
                if topic in group_dict:
                    group_dict[topic].extend(['</br>'] + data)
                else:
                    group_dict[topic] = data

{'pins': {'Category': ['General'], 'Contact': ['Mark'], 'Description': ['1st', 'line', '2nd', 'line'] } , 'nails':{'Category':['specific'], 'Description':['1st line']}