Group name acquisition and no lazy loading problem

[ezeli]

When opening the hdf5 file, you must specify the group name defined at the time of creation. How should I obtain this group name if I have forgotten it ?
Another question is when opening hdf5 files, how to load them into memory all at once without lazy loading ?
Thank you !

[JovanVeljanoski]

Hi!

When opening the hdf5 file, you must specify the group name defined at the time of creation. How should I obtain this group name if I have forgotten it ?

You can think of HDF5 files as a sort of containers. They do not have a pre-defined structure or a standard.. So in vaex we have an expectation of where the data should be (location) and how it should be stored (columnar format). But i think the gist of your question goes beyond vaex.. probably search elsewhere online how to "browse" the structure of an hdf5 files. Maybe with h5py it can be done..

Another question is when opening hdf5 files, how to load them into memory all at once without lazy loading ?

Calling df = df.materialize() immediately after calling vaex.open() will put everything in RAM.