trend
Time trend is linear regression to time.
Packages
statsmodels tsa
statsmodels.tsa.seasonal.seasonal_decompose — statsmodels
https://www.statsmodels.org/dev/generated/statsmodels.tsa.seasonal.seasonal_decompose.html
Paid Tutorial
Seasonality, trend and noise in time series data | Python
https://campus.datacamp.com/courses/visualizing-time-series-data-in-python/seasonality-trend-and-noise?ex=6
Examples
from xarray, calculate trend with p-value, using scipy.stats.linregress
dask array operations#5d7740d13fe4fa00005edeb5
python - Linear regression with pandas time series - Stack Overflow
https://stackoverflow.com/questions/37337836/linear-regression-with-pandas-time-series