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# This shows how to use the cols accessors for table columns
from tables import *
class Particle(IsDescription):
name = StringCol(16, pos=1) # 16-character String
lati = Int32Col(pos=2) # integer
longi = Int32Col(pos=3) # integer
vector = Int32Col(shape=(2,), pos=4) # Integer
matrix2D = Float64Col(shape=(2,2), pos=5) # double (double-precision)
# Open a file in "w"rite mode
fileh = openFile("table2.h5", mode = "w")
table = fileh.createTable(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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