Installation instructions: wheel, leveldb-dev

[gsalzer]

The installation instructions are almost perfect. On my Ubuntu 18.04 distributions, two more things were necessary for successful installation:

• pip3 install wheel (could maybe go into requirements.txt, see e.g. stackexchange)
• sudo apt install libleveldb-dev (required for compiling plyvel/_plyvel.cpp during the installation process)

[metagon]

Thanks for bringing this up. From my limited knowledge on this matter I believe that wheel is not necessarily required. The installation process throws errors when it cannot build the wheels due to the missing dependency, but it will however fallback to installing the packages with setup.py install. Did the installation fail completely in your case, or was it just the errors? I will look into it and see if it makes sense to include it in requirements.txt (for some reason it is excluded by default from pip freeze). I will also have a look into the libleveldb-dev dependency. Could it be the case that the installation failed in your case exclusively because of this?