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# This shows how to use the cols accessors for table columns
import tables as tb
class Particle(tb.IsDescription):
name = tb.StringCol(16, pos=1) # 16-character String
lati = tb.Int32Col(pos=2) # integer
longi = tb.Int32Col(pos=3) # integer
vector = tb.Int32Col(shape=(2,), pos=4) # Integer
matrix_2d = tb.Float64Col(shape=(2, 2), pos=5) # double (double-precision)
# Open a file in "w"rite mode
fileh = tb.open_file("table2.h5", mode="w")
table = fileh.create_table(fileh.root, "table", Particle, "A table")
# Append several rows in only one call
table.append(
[
("Particle: 10", 10, 0, (10 * 9, 1), [[10**2, 11 * 3]] * 2),
("Particle: 11", 11, -1, (11 * 10, 2), [[11**2, 10 * 3]] * 2),
("Particle: 12", 12, -2, (12 * 11, 3), [[12**2, 9 * 3]] * 2),
("Particle: 13", 13, -3, (13 * 11, 4), [[13**2, 8 * 3]] * 2),
("Particle: 14", 14, -4, (14 * 11, 5), [[14**2, 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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