can't display the line by line converted list on the webpage using python

Question

this the first function that returns the list:

def getListOfKeyWord(keyword):
df=pd.read_excel('finaltrue.xlsx')
corpus=[]
for i in range(len(df)):
    if keyword in df["text"][i]:
        corpus.append(df["text"][i])
return corpus

this the function where i printing the list as line by line:

def listing(result):
    x=0
    for item in range(0,len(result)):
        x+=1
        table = print(x,"",result[item])
    return table

this is the placeholder in html :

<div class="row center">
    {{key}}
  </div>

and here where i call the functions at the app.routing

 if request.method=='POST':
    word = request.form['kword']
    result=getListOfKeyWord(word)
    table=listing(result)
    return render_template('advance_search.html',key=table)
return render_template('advance_search.html')

now i get a "none" word at the placeholder position can anyone help please ?

`for item in range(0,len(result)): x+=1 table = print(x,"",result[item]) return table` is effectively reseting value of table evey time — Epsi95, Jul 04 '21 at 04:14
Also what type is the of lthe returned value by function `listing`? Is it a `list` or a string? — AmaanK, Jul 04 '21 at 04:24
You don't, you assemble the string with string formatting (f-strings, `.format()` or old `%` style) — Klaus D., Jul 04 '21 at 04:29
@Epsi95 then how to fix it in order to return the value that contains the line by line list? — omar elhabbak, Jul 04 '21 at 04:33
@KlausD. can u please show me the syntax, how to write it ? in order to fix it — omar elhabbak, Jul 04 '21 at 04:34
Well, I could, but I think it would on the long run (and maybe even a shorter) that you educate yourself your string formatting. It is an important concept in Python. There are countless resources on the internet. One example: https://docs.python.org/3/tutorial/inputoutput.html — Klaus D., Jul 04 '21 at 04:36
@KlausD. i really searched but i don't have that much time cause of the deadline of my graduation project, so if u can help me to get it done faster, i will be thankful — omar elhabbak, Jul 04 '21 at 04:40
Does this answer your question? [cannot display a line by line list on flask webpage](https://stackoverflow.com/questions/68242143/cannot-display-a-line-by-line-list-on-flask-webpage) — nngeek, Jul 06 '21 at 14:28

score 0 · Answer 1 · answered Jul 06 '21 at 14:34

First of all, you cannot assign the output of print() function to a variable.

The key issue here is your listing function. You can use this code instead:

def listing(result):
    table = '<br>'.join([ f'{i+1}- {item}' for i, item in enumerate(result) ])
    print(table)
    return table

You need to use <br> instead of \n to join the list since HTML will show <br> as new line, not \n.

can't display the line by line converted list on the webpage using python

1 Answers1