pvlib github I installed pvlib by: pip3 install pvlib later, while trying to compile and run an example pvsystem , I came across some errors, related to matplotlib: ImportError: libhdf5_serial.so.103: cannot open shared object file: No such file or directory how to solve it: this stackoverflow doesn't work for me: remove h5py before install sudo apt-get install python3-h5py which shows: 403 forbidden ( repository error...) Instead, I solved it by: pip3 install h5py sudo apt-get install python3-h5py Timezones: Pls note ETC/GMT+8 is 8 hours behind GMT, ie Pacific, Mexico Readthedocs IBM tutorials notebook