This programs takes information from multiple DS18B20 probes and posts their readings to Google Sheets using gspread.
The tempReader program is sort of a base level program. It returns elapsed time, and temperature values for each probe in the terminal. It is a good place to start if you are just making sure that you are getting times and temperatures correctly.
The tempLoggerGoogle program is a little more advanced. It requires you to use the Google Cloud Platform in order to get the temperatuer readings in a sheet. While it does require more work, you are able to log your data into something that is permanent and accessible from anywhere in the world. I would recommend looking at this GSpread tutorial, and this datalogging tutorial before working with this.