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# This is an example on how to use complex columns
import numpy as np
import tables as tb
dt = np.dtype("i4,f8", align=True)
# Create a file with regular padding
print("attrs *with* padding:")
fileh = tb.open_file(
"attrs-with-padding.h5", mode="w", pytables_sys_attrs=False
)
attrs = fileh.root._v_attrs
# Set some attrs
attrs.pq = np.zeros(2, dt)
attrs.qr = np.ones((2, 2), dt)
attrs.rs = np.array([(1, 2)], dt)
print("repr(attrs)-->", repr(attrs))
fileh.close()
# Create a file with no padding
print("\nattrs *without* padding:")
fileh = tb.open_file(
"attrs-without-padding.h5",
mode="w",
pytables_sys_attrs=False,
allow_padding=False,
)
attrs = fileh.root._v_attrs
# Set some attrs
attrs.pq = np.zeros(2, dt)
attrs.qr = np.ones((2, 2), dt)
attrs.rs = np.array([(1, 2)], dt)
print("repr(attrs)-->", repr(attrs))
fileh.close()
print("\n ***After closing***\n")
print("attrs *with* padding:")
fileh = tb.open_file("attrs-with-padding.h5", mode="r")
attrs = fileh.root._v_attrs
print("repr(attrs)-->", repr(attrs))
fileh.close()
print("\nattrs *without* padding:")
fileh = tb.open_file("attrs-without-padding.h5", mode="r")
attrs = fileh.root._v_attrs
print("repr(attrs)-->", repr(attrs))
fileh.close()
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