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image.py
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Tue, May 21, 01:55

image.py
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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
""" This super class can be used to represent all image types.
"""
# Copyright (C) University of Basel 2019 {{{1
#
# This program 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 of the License, or
# (at your option) any later version.
#
# This program 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 this program. If not, see <https://www.gnu.org/licenses/> 1}}}
__author__ = "Christian Steiner"
__maintainer__ = __author__
__copyright__ = 'University of Basel'
__email__ = "christian.steiner@unibas.ch"
__status__ = "Development"
__license__ = "GPL v3"
__version__ = "0.0.1"
from lxml import etree as ET
from os.path import isfile
from .attachable_object import AttachableObject
from .class_spec import SemanticClass
class Image(AttachableObject,SemanticClass):
"""
This super class represents all types of images.
Args:
file_name (str): name of the image file.
node (lxml.etree.Element) node, containing information
URL (str): URL of image file.
height (float): height of image
width (float): width of image
"""
stringKeys = [ 'file_name', 'URL' ]
floatKeys = [ 'height', 'width' ]
def __init__(self, node=None, file_name=None, URL=None, height=0.0, width=0.0, tag='image'):
if node is not None:
self.file_name = node.get('file-name')
self.URL = node.get('absolute-path')
self.height = float(node.get('height'))
self.width = float(node.get('width'))
else:
self.tag = tag
self.file_name = file_name
self.URL = URL
self.height = height
self.width = width
def attach_object_to_tree(self, target_tree):
"""Attach object to tree.
"""
obj_node = target_tree.getroot().find('.//' + self.tag) \
if(len(target_tree.getroot().findall('.//' + self.tag)) > 0) \
else ET.SubElement(target_tree.getroot(), self.tag)
for key in self.floatKeys:
if self.__dict__[key] is not None:
obj_node.set(key.replace('_','-'), str(round(self.__dict__[key], 3)))
for key in self.stringKeys:
if self.__dict__[key] is not None:
obj_node.set(key.replace('_','-'), self.__dict__[key])
@staticmethod
def get_semantic_dict():
"""Returns semantic dictionary of this class.
"""
class_dict = {}
class_dict.update({'class': __class__})
class_dict.update(dict(zip(Image.floatKeys, [ float for i in Image.floatKeys])))
class_dict.update(dict(zip(Image.stringKeys, [ str for i in Image.stringKeys])))
return class_dict

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