Problem Statement I have my Flask backend running on one server, and I use another computer, in the same network to send a post request to the Flask backend, I got an error like “Failed to connect to <ip> port <port> after 215 ms: Couldn’t connect to server” error. Nothing shows up in flask log. […]

On Ubuntu, we can use this command It will output something like After this, we can use ssh-add Explain “eval $(ssh-agent -s)” The command eval $(ssh-agent -s) is a convenient way to start the SSH agent and set up the necessary environment variables in the current shell session. Here’s a breakdown of what each part […]

The easiest way is to use brew After this, to verify helm is installed successfully

The values of the column like “[‘a’, ‘b’]”, “[‘a’]”, “[‘c’, ‘a’]” json_each(json_column): This function is used to expand the JSON array into a set of key-value pairs, where the key is the index or key within the array, and the value is the corresponding element. So that for each record of you_table, it will expand […]

Here is an example showing

Using os.path Using pathlib (Python 3.4 or later)

SQLite does NOT have a native ENUM data type like some other database systems such as MySQL. However, you can simulate enums in SQLite using a combination of a CHECK constraint and a TEXT or INTEGER column. Here’s an example using a TEXT column: If you need to add new values to your “enum” or […]

This can be done by using the ‘opencv-python’ library. Install opencv-python Take the first frame of a video To capture a screenshot at 95% of the video duration To capture a screenshot at specific time like 3:24 Percentage to Screenshot time conversion To capture a snapshot at 95% of the video duration and then compute […]