pymongo 3.x.x does not work as a dependency lower version needed

[simkoc]

The documentation says that pymongo version 3.x.x is needed. But when installing the current one 3.2.2 or 3.0.0 using pip3 I encounter the following error:

ImportError: No module named 'pymongo.connection'

Installing pymongo 2.9 via pip3 install pymongo==2.9 fixes the problem and the crawler seems to run. Apparently there were some major code changes for version 3.0.

Even though this is technically not an error, a change in the dependency documentation would be great.