@app.route('/request/', methods=['GET'])
def req():
name = request.args.get("first")
eman = request.args.get("second")
if name != None and eman != None:
name = int(name)
eman = int(eman)
s = name + eman
else:
s = "У тебя тама какой то NONE"
print(name)
return render_template("form.html", getR=s)
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<form action="/request/" method="get">
<input type="text" name="first" value="0">
<input type="text" name="second" value="0">
<input type="submit" value="Отправить">
</form>
<h1>{{getR}}</h1>
<h1>{{name}}</h1>
</body>
</html>