使用Python写入文件时出错

Question

我需要一些帮助。我在使用python连接字符串时遇到一些错误。错误如下所示。

错误：

appstr='<location name="'+ re.escape(location_name) +'"><room id="'+ re.escape(num) + '"><roomname>+'re.escape(rname)'+</roomname><noseats>+'re.escape(seat)'+</noseats><projectorscreen>+'re.escape(projector)'+</projectorscreen><videoconf>+'re.escape(video)'+</videoconf></room></location>'
                                                                                                          ^
SyntaxError: invalid syntax

我正在解释下面的代码。

def some(request):
    if request.method == 'POST':
        serch=request.POST.get('searchby')
        location_name = request.POST.get('lname')
        rname = request.POST.get('rname')
        seat = request.POST.get('seat')
        projector = request.POST.get('projector')
        video = request.POST.get('video')
        num=str(random.randint(100000000000,999999999999))
        if serch == 'Default':
            doc = m.parse("roomlist.xml")
            root=doc.getElementsByTagName("roomlist")
            valeurs = doc.getElementsByTagName("roomlist")[0]
            element = doc.createElement("location")
            element.setAttribute("name"  , location_name)
            el1 = element.appendChild(doc.createElement("room"))
            el1.setAttribute("id", num)
            el2=el1.appendChild(doc.createElement("roomname"))
            el2.appendChild(doc.createTextNode(rname))
            el3=el1.appendChild(doc.createElement("noseats"))
            el3.appendChild(doc.createTextNode(seat))
            el4=el1.appendChild(doc.createElement("projectorscreen"))
            el4.appendChild(doc.createTextNode(projector))
            el5=el1.appendChild(doc.createElement("videoconf"))
            el5.appendChild(doc.createTextNode(video))
            valeurs.appendChild(element)
            doc.writexml(open("roomlist.xml","w"))
        if serch == 'code':
            file1 = open("roomlist.xml","r")
            flstr = file1.replace("</roomlist>", "")
            appstr='<location name="'+ re.escape(location_name) +'"><room id="'+ re.escape(num) + '"><roomname>+'re.escape(rname)'+</roomname><noseats>+'re.escape(seat)'+</noseats><projectorscreen>+'re.escape(projector)'+</projectorscreen><videoconf>+'re.escape(video)'+</videoconf></room></location>'
            wstr = flstr + appstr + '</roomlist>'
            file1.close()
            wfile=open("roomlist.xml","w")
            wfile.write(wstr)
    return render(request, 'booking/bmr.html', {})

这里我需要将数据写入一个现有文件。请帮我解决这个错误。