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# This is an example on how to use complex columns
import tables as tb
class Particle(tb.IsDescription):
name = tb.StringCol(16, pos=1) # 16-character String
lati = tb.ComplexCol(itemsize=16, pos=2)
longi = tb.ComplexCol(itemsize=8, pos=3)
vector = tb.ComplexCol(itemsize=8, shape=(2,), pos=4)
matrix_2d = tb.ComplexCol(itemsize=16, shape=(2, 2), pos=5)
# Open a file in "w"rite mode
fileh = tb.open_file("table3.h5", mode="w")
table = fileh.create_table(fileh.root, "table", Particle, "A table")
# Append several rows in only one call
table.append(
[
("Particle: 10", 10j, 0, (10 * 9 + 1j, 1), [[10**2j, 11 * 3]] * 2),
(
"Particle: 11",
11j,
-1,
(11 * 10 + 2j, 2),
[[11**2j, 10 * 3]] * 2,
),
(
"Particle: 12",
12j,
-2,
(12 * 11 + 3j, 3),
[[12**2j, 9 * 3]] * 2,
),
(
"Particle: 13",
13j,
-3,
(13 * 11 + 4j, 4),
[[13**2j, 8 * 3]] * 2,
),
(
"Particle: 14",
14j,
-4,
(14 * 11 + 5j, 5),
[[14**2j, 7 * 3]] * 2,
),
]
)
print("str(Cols)-->", table.cols)
print("repr(Cols)-->", repr(table.cols))
print("Column handlers:")
for name in table.colnames:
print(table.cols._f_col(name))
print("Select table.cols.name[1]-->", table.cols.name[1])
print("Select table.cols.name[1:2]-->", table.cols.name[1:2])
print("Select table.cols.name[:]-->", table.cols.name[:])
print("Select table.cols._f_col('name')[:]-->", table.cols._f_col("name")[:])
print("Select table.cols.lati[1]-->", table.cols.lati[1])
print("Select table.cols.lati[1:2]-->", table.cols.lati[1:2])
print("Select table.cols.vector[:]-->", table.cols.vector[:])
print("Select table.cols['matrix2D'][:]-->", table.cols.matrix2D[:])
fileh.close()
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