How to use HDF5 files in Python (via) HDF5: the missing manual. A detailed explanation of the HDF5 file format and how to work with it using the h5py module. HDF5 allows you to efficiently store multiple datasets (plus metatdata about them) in a single file and then load data from them without pulling the entire file into memory—kind of like SQLite but without the SQL support and more optimized for working with arrays.
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