Convert data.frame factor columns to character columns before trying to replace NULL values.
Find NULLs in a dataframe using is.na().
Ctrl-Z to the rescue. ‘nuf said.
Adding temporary print statements to troubleshoot Python code is quick and dirty. And messy. Incorporating logging into your code habit is a great alternative to relying on ad-hoc print statements that just need to get deleted later.
Save a Google Colab notebook to another format, such as HTML or PDF.
When HTML files on GitHub are too big to render, here’s a quick work-around.