Hands on the Python Library pexpect

Aug 03, 2021

Tips and Traps¶

The command-line tool of some (e.g., network) applications might be slow to authenticate. If you use pexect to automate such a command-line tool, it is best to wait for sometime after sending password using child.sendline(passwd). If the authentication has ouput on both success and failure, a smart way is to wait for the success or failure message to come out.

May 24, 2015

Use IPython as much as possible.
- IPython has virtues of both shell and Python.
- You should avoid using shell scripts for complicate tasks any way.
If you do want to use a Unix/Linux shell, I'd suggest you stick to Bash unless Linux distributions start …

Jan 03, 2019

Shell Command	Alternative	Python
which git	shutil.which("git")	shutil
mkdir -p /path/to/file	Path("path/to/some/file").mkdir(exist_ok=True)	pathlib
	os.makedirs("/path/to/file", exist_ok=True)	os
	!mkdir -p /path/to/file	IPython
	mkdir -p /path/to/file	xonsh
cp …

Aug 15, 2021

The Python package PyPDF can be used to extract pages from a PDF file. The function aiutil.pdf.extract_pages is a wrapper over PyPDF which makes it even easier to extract pages from a PDF file.

Stirling-PDF is is a robust, locally hosted web-based PDF manipulation tool using Docker.

Sep 24, 2021

This approaches requires you to have a running TensorBoard which is serving the data you want to read.

Check the checkbox "Show data download links". See highlighted in the top-left corner of the screenshot below for an example.
Select an experimentation whose you'd like to download. See highlighted in the bottom-right corner of the screenshot for an example.

Apr 26, 2021

There are 2 popular Python libraries tomlkit and toml for parsing TOML formatted files in Python. tomlkit is preferred to toml as it is more flexible and style-preserving.
A TOML file always interpret a key (even a bare ASCII integer) as string. For this reason, a dict with numerical keys …