I am currently new to programming ; So the problem is i am not able to import csv file to my PostgreSQL database and below is my code:

> 
> 
> ```
> import os
> import csv
> 
> ```
> 
> 

```
from sqlalchemy import create_engine
from sqlalchemy.orm import scoped_session, sessionmaker

engine = create_engine(os.getenv("DATABASE_URL"))
db = scoped_session(sessionmaker(bind=engine))

def main():
    b = open("books.csv")
    reader = csv.reader(b)
    for isbn, title, author, year in reader:
        db.execute("INSERT INTO books1(isbn, title, author, year) VALUES(:isbn, :title, :author, 
         :year)",
                {"isbn":isbn, "title":title, "author":author, "year":year})

    print(f"{isbn} Added to {title} ")
db.commit()

if __name__ == "__main__":
    main()

```

And error is shown as 

```
[SQL: INSERT INTO books1(isbn, title, author, year) VALUES(%(isbn)s, %(title)s, %(author)s, % 
(year)s)]
[parameters: {'isbn': 'isbn', 'title': 'title', 'author': 'author', 'year': 'year'}]
(Background on this error at: http://sqlalche.me/e/9h9h)

```

Can any one help me... please !!!