How to read data from a file in Flask?

Question

Python

Task: Book website in Flask. The chapters are loaded in the same html template. Chapters are text files with titles. ch1.txt , ch2.txt , etc.
Chapter page template - ch.html
Task. So that when requesting, say, site_name / ch3.html, the chapter from the ch3.txt file is loaded with template parameters (background color, formatting, etc.) ch.html
No matter how I fight, I can’t find a solution to such a simple task anywhere.
Thanks in advance for your reply!

Answer 1

I don’t know what doesn’t work there - everything seems to be simple, even the dumbest schoolboy could do:

@app.route('/<str:name>.html')
def Loader(name):
    if os.path.isfile(name+".txt"):
        text = open(name+".txt","rb").read()
    else:
        text = "не найдено"
    return render_template('ch.html', text=text)

and template:
<pre>{{ text }}</pre>