import numpy as np

import tables as tb

# Create a VLArray:
fileh = tb.open_file("vlarray1.h5", mode="w")
vlarray = fileh.create_vlarray(
    fileh.root,
    "vlarray1",
    tb.Int32Atom(shape=()),
    "ragged array of ints",
    filters=tb.Filters(1),
)
# Append some (variable length) rows:
vlarray.append(np.array([5, 6]))
vlarray.append(np.array([5, 6, 7]))
vlarray.append([5, 6, 9, 8])

# Now, read it through an iterator:
print("-->", vlarray.title)
for x in vlarray:
    print("%s[%d]--> %s" % (vlarray.name, vlarray.nrow, x))

# Now, do the same with native Python strings.
vlarray2 = fileh.create_vlarray(
    fileh.root,
    "vlarray2",
    tb.StringAtom(itemsize=2),
    "ragged array of strings",
    filters=tb.Filters(1),
)
vlarray2.flavor = "python"
# Append some (variable length) rows:
print("-->", vlarray2.title)
vlarray2.append(["5", "66"])
vlarray2.append(["5", "6", "77"])
vlarray2.append(["5", "6", "9", "88"])

# Now, read it through an iterator:
for x in vlarray2:
    print("%s[%d]--> %s" % (vlarray2.name, vlarray2.nrow, x))

# Close the file.
fileh.close()