Ben Chuanlong Du's Blog

It is never too late to learn.

Date and Time in Python pandas

Date/time utilities in the pandas module are more flexible/powerful than that in the datetime module. It is suggested that you use date/time utilities in the pandas module when you use DataFrame/Series in the pandas module.

  1. pandas.to_datetime works on an iterable object, handles missing values and nano seconds.

  2. pandas.Series.dt.strftime

Tips on PySimpleGUI

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

http://www.blog.pythonlibrary.org/2019/10/23/a-brief-intro-to-pysimplegui/

https://pysimplegui.readthedocs.io/en/latest/

Issues in pip and Solutions

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

The issue is due to to pyopenssl using old dependencies. It can be fixed by removing the Python package cryptography package and then upgrading …

Get Coordinates of Points on a Screen or Image

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

Get the Coordinate of a Pixle/Point on an Image

Most image editing software (e.g., GIMP) can tell you the coordinate of a point on an image.

Get the Coordinate …

Tips on Wajig

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

Wajig on Debian Wiki

  1. You can type enter the CLI of wajig by typing wajig in terminal, so that you can use commands of wajig directly instead of typing wajig every …