The __iter__
method of the cursor class in psycopg2 can be expanded by using a generator function that yields each row of the result set. Here is an example code:
import psycopg2
con = psycopg2.connect(database="mydb", user="myuser", password="mypassword")
cur = con.cursor()
def iter_rows(cursor):
while True:
row = cursor.fetchone()
if not row:
break
yield row
cur.execute("SELECT * FROM mytable")
for row in iter_rows(cur):
print(row)
cur.close()
con.close()
In this code, we define a generator function iter_rows
that takes a cursor as an argument. The function uses a while loop to fetch each row from the cursor and yield it. The loop exits when there are no more rows to fetch. We then pass our cursor to iter_rows
and iterate over the rows using a for loop. Finally, we close the cursor and connection to the database.
Please start posting anonymously - your entry will be published after you log in or create a new account. This space is reserved only for answers. If you would like to engage in a discussion, please instead post a comment under the question or an answer that you would like to discuss
Asked: 2022-08-03 11:00:00 +0000
Seen: 16 times
Last updated: Jun 30 '21
What is the process for incorporating std::hash into a class template?
What is the process for adding a class path permanently to the Mac terminal?
What is the process for obtaining and recording all Linq To Db queries in a database table?
What is the method for directing focus toward the subset within an existing class?
How do I reference media element events located on a ContentView from a ContentPage XAML CS class?
What is the issue when Selenium is unable to locate an element by its class name?
Is there a potential for a conflict between the name of a class and the name of a property?
How to obtain the value of an annotation by using reflection?