Kaggle offers a no-setup, customizable, Jupyter Notebooks environment. Access GPUs at no cost to you and a huge repository of community published data & code. Inside Kaggle you’ll find all the code & data you need to do your data science work. Use over 50,000 public datasets and 400,000 public notebooks to conquer any analysis in no time.

I find some useful code & data I need to do my data science work. Many authors also come with the description of the data when providing data, and make some corrections, which makes me realize that the hotspot research direction in the current field, as well as provides with many research inspiration