Day 1 of the 14-day Python revision challenge for machine learning commenced with a focus on basic Python concepts like output, variables, and strings.
Basic Output with print() function was covered, demonstrating how to customize separators and line endings for text output.
Variables were explained as data containers storing values, with insights on memory address, references, and size.
String manipulations and methods like converting input to numbers, changing case, splitting text, and finding characters within strings were highlighted for text processing.