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Create new variable-length data type


vlen_type_id = H5T.vlen_create(base_id)


vlen_type_id = H5T.vlen_create(base_id) creates a new variable-length (VL) data type. base_id specifies the base type of the data type to create.


Create a variable length data type for 64-bit floating-point numbers.

base_type_id = H5T.copy('H5T_NATIVE_DOUBLE');
vlen_type_id = H5T.vlen_create(base_type_id);