In [8]:

    

import cv2
import os

class Position(object):
    def __init__(self, x=0, y=0, extra={}):
        self.x = x
        self.y = y
        self.extra = extra
    
class Rectangle(object):
    def __init__(self, left=0, top=0, right=None, bottom=None, width='100%', height='100%'):
        pass


    

In [9]:

    

class FileNotExistsException(Exception):
    pass

class ImageFormatException(Exception):
    pass


    

In [10]:

    

class Image(object):
    def __init__(self, filename=None, data=None, format=None, cvobj=None):
        self._cvobj = None
        if filename is not None:
            if not os.path.exists(filename):
                raise FileNotExistsException('filename: "%s"' % filename)
            
            self._cvobj = cv2.imread(filename)
            
        if self._cvobj is None:
            raise ImageFormatException("Canot recognize image format")
    
    def show(self):
        pass
    
    def save(self, filename):
        pass
    
    def rect(self):
        return Rectangle()
    
    def crop(self, rect):
        return Image(cvobj=self._cvobj)
    
    
#Image(filename='oo')


    

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