Python HDF5 H5Py issues opening multiple files

Question

I am usint the 64-bit version of Enthought Python to process data across multiple HDF5 files. I\'m using h5py version 1.3.1 (HDF5 1.8.4) on 64-bit Windows.

I have

Answer 1

I've concluded that this is a strange manifestation of Perplexing assignment behavior with h5py object as instance variable . I re-wrote my code so that each file is handled within a function call and the variable is not reused. Using this approach, I don't see the same strange behavior and it seems to work much better. For clarity, the solution looks more like:

files = glob(r'path\*.h5')
out_csv = csv.writer(open('output_file.csv', 'rb'))

def extract_data_from_filename(filename):
    return extract_data_from_handle(hdf5.File(filename, 'r'))

for filename in files:
  data = extract_data_from_filename(filename)
  for row in data:
     out_csv.writerow((filename, ) +row)