如题，下面是发送代码

def post(client,imageform,snn,weight1):
    ww=''
    client.send(header)
    length1=imageform.size()+len(body_sn)+len(fenge)+len(body_weight)+len(body_img)+len(snn)+len(weight1)
    print('leng=%d'%length1)
    client.send(str(length1)+'\r\n\r\n')
    client.send(body_sn)
    client.send(snn)
    client.send(body_weight)
    for jj in weight1:
        ww=ww+str(jj)
    client.send(ww)
    ww=''
    client.send(body_img)
    client.send(imageform)
    client.send("\r\n------WebKitFormBoundary7MA4YWxkTrZu0gW--\r\n")#就这句报错
    print(client.recv(2048))

如果注释掉图片发送或是在发送图片之前发送就不会报错了，请大神指点迷津