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"""Use the H5FD_SPLIT driver to store metadata and raw data in separate files.
In this example, we store the metadata file in the current directory and
the raw data file in a subdirectory.
"""
import errno
from pathlib import Path
import numpy as np
import tables as tb
FNAME = "split"
DRIVER = "H5FD_SPLIT"
RAW_DIR = Path(__file__).with_name("raw")
DRIVER_PROPS = {"driver_split_raw_ext": str(RAW_DIR / "%s-r.h5")}
DATA_SHAPE = (2, 10)
class FooBar(tb.IsDescription):
tag = tb.StringCol(16)
data = tb.Float32Col(shape=DATA_SHAPE)
try:
RAW_DIR.mkdir()
except OSError as e:
if e.errno == errno.EEXIST:
pass
with tb.open_file(FNAME, mode="w", driver=DRIVER, **DRIVER_PROPS) as f:
group = f.create_group("/", "foo", "foo desc")
table = f.create_table(group, "bar", FooBar, "bar desc")
for i in range(5):
table.row["tag"] = "t%d" % i
table.row["data"] = np.random.random_sample(DATA_SHAPE)
table.row.append()
table.flush()
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