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objecttree.py
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70 lines (52 loc) · 2.26 KB
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#!/usr/bin/python
# -*- coding: utf-8 -*-
# Copyright (C) 2018 David Arroyo Menéndez
# Author: David Arroyo Menéndez <[email protected]>
# Maintainer: David Arroyo Menéndez <[email protected]>
# This file is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3, or (at your option)
# any later version.
# This file is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with GNU Emacs; see the file COPYING. If not, write to
# the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
# Boston, MA 02110-1301 USA,
from tables import *
class Particle(IsDescription):
identity = StringCol(itemsize=22, dflt=" ", pos=0) # character String
idnumber = Int16Col(dflt=1, pos = 1) # short integer
speed = Float32Col(dflt=1, pos = 2) # single-precision
# Open a file in "w"rite mode
fileh = open_file("objecttree.h5", mode = "w")
# Get the HDF5 root group
root = fileh.root
# Create the groups
group1 = fileh.create_group(root, "group1")
group2 = fileh.create_group(root, "group2")
# Now, create an array in root group
array1 = fileh.create_array(root, "array1", ["string", "array"], "String array")
# Create 2 new tables in group1
table1 = fileh.create_table(group1, "table1", Particle)
table2 = fileh.create_table("/group2", "table2", Particle)
# Create the last table in group2
array2 = fileh.create_array("/group1", "array2", [1,2,3,4])
# Now, fill the tables
for table in (table1, table2):
# Get the record object associated with the table:
row = table.row
# Fill the table with 10 records
for i in range(10):
# First, assign the values to the Particle record
row['identity'] = 'This is particle: %2d' % (i)
row['idnumber'] = i
row['speed'] = i * 2.
# This injects the Record values
row.append()
# Flush the table buffers
table.flush()
# Finally, close the file (this also will flush all the remaining buffers!)
fileh.close()