Flask出现500报错

Question

问题遇到的现象和发生背景

在xes的python编辑器里面，内存只有20M，在以前都可以的情况下，最近一次报了500错误

问题相关代码，请勿粘贴截图

main.py

from flask import Flask,render_template,request,redirect,session
from getnews import get_news
import pickle
app = Flask(__name__)
#设置秘钥
app.config['SECRET_KEY']='**##$$..tuiio23'

@app.route("/logout")
def logout():
    session.clear()
    return redirect("/")
ids=[{"name":"admin","pwd":"123456"},{"name":"UT","pwd":"aiyayouchoule"},{"name":"小震","pwd":"wenxinshimvp"},{"name":"陈文忻","pwd":"xiaozhenniubi"}]
#{
#设置登录入口路由，响应HTML页面
@app.route("/login")
def login_enter():
    return render_template('login.html')  

#设置用户登录路由，响应登录是否成功
@app.route("/loginpost",methods=["POST"])  
def login():
    name = request.values.get("user")
    pwd = request.values.get("pwd")
    for cwx in ids:
        if name==cwx["name"] and pwd==cwx["pwd"]:  
            session["name"] =  name
            return redirect("/")
    return render_template("fail.html")

# 读取pickle文件中保存的留言
try:
    with open("messages.pickle",'rb') as f:
        messages = pickle.load(f)
except:
    messages = []

# 呈现和保存留言
@app.route("/messageboard")
def message_board():
    name = request.values.get("who")
    text = request.values.get("text")
    if name and text:
        message = {"name":name,"text":text}
        messages.append(message)
        with open("messages.pickle",'wb') as f:
            pickle.dump(messages,f)
    return render_template("messageboard.html",messages = messages)

#删除留言
@app.route("/delmsg") 
def del_msg():
    msgtext = request.values.get("text")  
    for msg in messages:             
        if msg["text"] == msgtext:    
            messages.remove(msg)      
            with open("messages.pickle","wb") as f:
                pickle.dump(messages,f)              
    return redirect("/messageboard")            

#读取pickle文件中保存的作品
try:
    with open("works.pickle","rb") as f:
        works = pickle.load(f)
except:
    works = []
  
# 默认网址对应的路由
@app.route('/')
def index():
    hot_news = get_news()
    return render_template("index.html", news = hot_news[:7:1],works = works)

@app.route("/redian")
def re():
    r=get_news()
    return render_template("redian.html",new=r)

@app.route("/uploadwork")
def upload_work():
    return render_template("uploadwork.html")
    
@app.route("/processwork",methods=["POST"])
def process_work():
    title = request.values.get("title")
    link = request.values.get("link")
    object = request.files.get("file")
    if title and link and object:
        fname = object.filename
        object.save("static/images/"+fname)
        new_work = {"title":title,"link":link,"file":fname}
        works.append(new_work)
        with open("works.pickle","wb") as f:
            pickle.dump(works,f)
        return redirect("/")
    else:
        return render_template("uploadwork.html")
        
@app.route("/delete") 
def del_work():
    work_title = request.values.get("worktitle")
    for work in works:
        if work["title"] == work_title:
            works.remove(work)
    with open("works.pickle","wb") as f:
        pickle.dump(works,f)
    return redirect("/")
#}
app.run()

index.html

getnews.py

def get_news():
    import requests #导库不说了
    import bs4
    response = requests.get("https://top.baidu.com/board?tab=realtime")
    soup = bs4.BeautifulSoup(response.text, "lxml")
    data = soup.find_all(name="a", class_="title_dIF3B")
    da=soup.find_all(name="a",class_="img-wrapper_29V76")
    #爬虫区
    #————————————————分————界————线——————————————————
    #算法区
    l1=[]
    l2=[]
    d={}
    try:
        #典型的给字典添加元素
        for n in data:
            l1.append(n.text)
        for n1 in da:
            l2.append(n1["href"])
        for i in range(max(len(l1),len(l2))):
            d[l1[i]]=l2[i]
        return d
    except:
        return "获取失败"

CSS、JS等起美化作用的和HTML没有展示

运行结果及报错内容

内部服务器错误
服务器遇到内部错误，无法完成您的请求。服务器过载或应用程序出错。

我的解答思路和尝试过的方法

其实以前我还弄得三个音乐，占用了5M
我认为是因为内存太多导致的，但去掉5M后还报500错误，请问这是怎么回事

我想要达到的结果

不要报错就行