Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!

The error message "error: expected item, found 'let'" is commonly encountered in Rust when you mistakenly place a let statement in an invalid location. A let statement can only be used …

Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!

Import a Module

1. There are 3 different ways to import Python modules.

   import module_name
   import module_name as alias
   from module import pkg_mod_or_fun
   

2. The module importlib.resources (since Python 3.7+) leverages …

Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!

#!/usr/bin/env bash

function install_icon.usage() {
    cat << EOF
NAME
    /scripts/sys/install_icon.sh - Download and install icon to /usr/local/bin/.
SYNTAX 
    /scripts/sys/install_icon.sh [-h]
EOF
}

function install_icon …

Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!

Awesome Python

Awesome Python Applications

Data Science

1. pandas: data frame.

2. scipy: scientific computing.

3. numpy: multi-dimensional arrays, fundation of pandas and deep learning packages.

4. re: regular expression

File System

1. shutil: copy, move …

Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!

Symptom

ImportError: Attempted Relative Import With No Known Parent Package

Solution

The best solution is to run the Python script as a Python module. However, you have to add the directory …