python数据关联处理

python循环判断问题

filepath=r'C:\HOSTCONINFO.csv'
linuxfilepath=r'C:\11.csv'
linuxfilepathnew=r'C:\index_new.csv'
IPList={}
with open(filepath,'r',encoding='UTF-8') as f:
    title=f.readline()
    line=f.readline()
    while line:
        IPList[line.split(',')[3]]=','.join(line.split(',')[4:8])
        line=f.readline()
    print(IPList)

with open(linuxfilepath, 'r', encoding='UTF-8') as flinux:
    with open(linuxfilepathnew, 'w', encoding='UTF-8') as flinuxnew:
        # line = flinux.readline()#剔除空行

        title=flinux.readline()
        flinuxnew.write(title.split('\n')[0]+',项目,负责人,电话,组织\n')
        line = flinux.readline()
        line = line.split('\n')[0]
        while line:
            print(line.split(',')[0])
            try:
                print(IPList[line.split(',')[0]])
                if IPList[line.split(',')[0]] !=None:
                    if ';' in line.split(',')[0]:
                        for data in line.split(',')[0].split(';'):
                            try:
                                if IPList[line.split(',')[0]] !=None:
                                    flinuxnew.write(line.split('\n')[0] + ',' + IPList[line.split(',')[0]] + '\n')
                                    break
                                else:
                                    continue
                            except Exception as err:
                                print(str(err))
                                continue
                    else:
                        flinuxnew.write(line.split('\n')[0]+','+IPList[line.split(',')[0]]+'\n')
                else:
                    flinuxnew.write(line)
            except Exception as e:
                flinuxnew.write(line.split('\n')[0] + ',\n')
            line=flinux.readline()
            line = line.split('\n')[0]