Collection of random handy tools.

This script uses the prompt_toolkit library to allow the user to interactively select strings from a list using a radio list or a checkbox list. Functions:

• select_from_radiolist(strings): Prompts the user to select a single string from a list using a radio list. Returns the selected string.

• select_from_checkboxlist(strings): Prompts the user to select one or more strings from a list using a checkbox list. Returns a list of selected strings.

Try to allocate memory in 1GB chunks. Print out allocated memory size and see when allocation failed. It's helpful to test the actual memory limits for a systems, especially in cloud or docker.

Python script to ping all IPs in a range and report result(up/down) in a table.

• Ping each IP 3 times.
• 0 packet loss means it's up, otherwise it's down.
• multiprocess is used to do it in parallel.

Parses letters in a file and present the occurances in a treemap.

• An interactive treemap will be rendered in web browser.
• An image file will be saved locally too.

The sample program parses itself.

Assume you have an interactive program your_program which accepts stdin and sends response to stdout. This simple script will setup a named pipe so that you can test it in batch.

• The inputs will be read from $input_dir, assuming a .txt file.
• Each output from the input will be write to $output_dir with _output append to the basename.