Hi.

While trying out this module, I've encountered following beheviour:

I used Tiled v 1.3.1 to create tmx file with 3 layers image, tiles and objects. In objects layer, I've added rotated elipses.

As you can see bellow, ogchild.attrib.get() can be float-based string in some instances, which fails to convert to int.

Simply changing 'int' typecast to 'float' for x, y, width, height and rotation fixed this issue for me.

Code:

import tmx
t=tmx.TileMap.load('heightmapped01.tmx')
---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
<ipython-input-2-6e387764c4ce> in <module>
----> 1 t=tmx.TileMap.load('heightmapped01.tmx')

~/PycharmProjects/SocialAgents/venv/lib/python3.6/site-packages/tmx/__init__.py in load(cls, fname)
    511                 self.layers.append(get_layer(child))
    512             elif child.tag == "objectgroup":
--> 513                 self.layers.append(get_objectgroup(child))
    514             elif child.tag == "imagelayer":
    515                 self.layers.append(get_imagelayer(child))

~/PycharmProjects/SocialAgents/venv/lib/python3.6/site-packages/tmx/__init__.py in get_objectgroup(layer_root)
    318                     oname = ogchild.attrib.get("name", "")
    319                     otype = ogchild.attrib.get("type", "")
--> 320                     ox = int(ogchild.attrib.get("x", 0))
    321                     oy = int(ogchild.attrib.get("y", 0))
    322                     owidth = int(ogchild.attrib.get("width", 0))


ValueError: invalid literal for int() with base 10: '224.669'