pyMannKendall: a python package for non parametric Mann Kendall family of trend tests.

Trend analysis is one of the most important measurements in studying time series data.Both parametric and non-parametric tests are commonly used in trend analysis.Parametric tests require data to be independent and normally distributed.On the other hand, non-parametric trend tests require only that the data be independent and can tolerate outliers in the data (Hamed & Rao, 1998).However, parametric tests are more powerful than nonparametric ones.