import bibtexparser as bp
from bibtexparser.bparser import BibTexParser
from bibtexparser.customization import convert_to_unicode

bibdata=[]
list=[]
while True:
    filename=input("用于合并的bib文件路径（按回车结束输入）：")
    if(filename==""):break
    #filename='/home/tmn07/Desktop/DeepM.bib'

    # /home/tmn07/Desktop/DeepM.bib
    # /home/tmn07/Desktop/citations_Neves2002Topology.bib

    with open(filename, encoding='UTF-8') as bibfile:
        parser = BibTexParser(common_strings=True)  # 声明解析器类
        parser.customization = convert_to_unicode  # 将BibTeX编码强制转换为UTF编码
        bibdata = bp.load(bibfile, parser)  # 通过bp.load()加载


    for item in bibdata.entries:
        flag=1
        for it in list:
            if item['title']==it['title'] and item['ENTRYTYPE']==it['ENTRYTYPE']:
                it=it.update(item)
                flag=0
                break
        if flag==1:list.append(item)



#print(list)
filename=input('保存结果的文件路径：')
#filename='/home/tmn07/Desktop/result.bib'
# /home/tmn07/Desktop/result.bib
bibdata.entries=list

with open(filename,'w') as bibfile:

    from bibtexparser.bwriter import BibTexWriter

    writer = BibTexWriter()
    writer.contents = ['entries']
    writer.indent = '    '
    writer.order_entries_by = ('id')
    e = bp.dumps(bibdata, writer)

    bibfile.write(e)