I’m getting an error while i use flash,it’s like-
plabon@plabon-H110M-S2PV-DDR3:~/Desktop/flask$ python flaskblog.py
File "flaskblog.py", line 40
flash(f'Account created for {form.username.data}!','success')
^
SyntaxError: invalid syntax
Can you please take a look in my code and help me to know where i am making mistakes?
I am giving all of my code in Ubuntu paste bin,
1)
flaskblog.py
2)
forms.py
3)
register.html
4)
layout.html
5)
main.css
6)
home.html
7)
about.html
I am suspicious of the f at the start of your string.
I’m trying to learning flask by YouTube tutorial.I did what he did.Can you please take a look please.
I set this link on specific time.
What version of Python are you using?
i have installed Python 2.7.18rc1 and Python 3.8 both 
It looks like you’re trying to run python with points to Python 2. What happens if you use python3 .... in the command line?
If i run python3 in the command line it opens python 3.8.2 version.Is python 2 is default version here?Should i try to change this? 
Did you run python3 flaskblog.py?
No,i didn’t before.But it shows like that.
I am not familiar with Flask, but I’d try installing the email validator next.
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