let weights[palette size] = weight for each colour
Although I could push these new libraries to GitHub now, machine learning algorithms are understandably a domain which requires extra care and testing. It would be arrogant to port Python’s scikit-learn — the gold standard of data science and machine learning libraries — to Rust with all the features that implies.
，更多细节参见Line官方版本下载
next_url = None
tee() splits a stream into two branches. It seems straightforward, but the implementation requires buffering: if one branch is read faster than the other, the data must be held somewhere until the slower branch catches up.