I believe dynamically typed languages are easier to use than old-style statically typed langages (Java, C, etc).

More modern statically typed languages can be quite easy to use (I am thinking of Scala) but none provides an ecosystem as rich as python's.

Plus, recent static languages (Scala, Rust, Haskell or even Elm) are more oriented toward "Software Engineers" or CS academics. Python appeals to a lot of "programmers" who's main job is actually data science, mechanical engineering, biologist...