class test(object):
    def __init__(self):
        pass
    
    def __repr__(self):
        "Lowest in the display order"
        txt = "2 + 2 = 4"
        return txt
    
#     def _repr_png_(self):
#         "Higher than text in the display order"
#         with open("PNG_doc.resized.png",'rb') as f:
#             txt = f.read()
#         return txt
    
#     def _repr_svg_(self):
#         "Higher then text in the display order"
#         txt = """<svg width="100" height="100">
#   <circle cx="50" cy="50" r="40" stroke="green" stroke-width="4" fill="yellow" />
# </svg>"""
#         return txt

#     def _repr_latex_(self):
#         "Second highest in the display order"
#         txt = "$$x^2 = 4$$"
#         return txt
    
#     def _repr_html_(self):
#         "Highest in the display order"
#         txt = "<strong>What?</strong>"
#         return txt

T = test()

T

# In order to make this executable on any other computer, I need to grab a 
# remote png file.

from urllib.request import urlretrieve

urlretrieve("http://i.imgur.com/aTxezXX.png", "PNG_doc.resized.png")

class test(object):
    def __init__(self):
        pass
    
    def __repr__(self):
        "Lowest in the display order"
        txt = "2 + 2 = 4"
        return txt
    
    def _repr_png_(self):
        "Higher than text in the display order"
        with open("PNG_doc.resized.png",'rb') as f:
            txt = f.read()
        return txt
    
#     def _repr_svg_(self):
#         "Higher then text in the display order"
#         txt = """<svg width="100" height="100">
#   <circle cx="50" cy="50" r="40" stroke="green" stroke-width="4" fill="yellow" />
# </svg>"""
#         return txt

#     def _repr_latex_(self):
#         "Second highest in the display order"
#         txt = "$$x^2 = 4$$"
#         return txt
    
#     def _repr_html_(self):
#         "Highest in the display order"
#         txt = "<strong>What?</strong>"
#         return txt

T = test()

T

class test(object):
    def __init__(self):
        pass
    
    def __repr__(self):
        "Lowest in the display order"
        txt = "2 + 2 = 4"
        return txt
    
    def _repr_png_(self):
        "Higher than text in the display order"
        with open("PNG_doc.resized.png",'rb') as f:
            txt = f.read()
        return txt
    
    def _repr_svg_(self):
        "Higher then text in the display order"
        txt = """<svg width="100" height="100">
  <circle cx="50" cy="50" r="40" stroke="green" stroke-width="4" fill="yellow" />
</svg>"""
        return txt

#     def _repr_latex_(self):
#         "Second highest in the display order"
#         txt = "$$x^2 = 4$$"
#         return txt
    
#     def _repr_html_(self):
#         "Highest in the display order"
#         txt = "<strong>What?</strong>"
#         return txt

T = test()

T

class test(object):
    def __init__(self):
        pass
    
    def __repr__(self):
        "Lowest in the display order"
        txt = "2 + 2 = 4"
        return txt
    
    def _repr_png_(self):
        "Higher than text in the display order"
        with open("PNG_doc.resized.png",'rb') as f:
            txt = f.read()
        return txt
    
    def _repr_svg_(self):
        "Higher then text in the display order"
        txt = """<svg width="100" height="100">
  <circle cx="50" cy="50" r="40" stroke="green" stroke-width="4" fill="yellow" />
</svg>"""
        return txt

    def _repr_latex_(self):
        "Second highest in the display order"
        txt = r"$$x^2 = \frac{16}{4}$$"
        return txt
    
#     def _repr_html_(self):
#         "Highest in the display order"
#         txt = "<strong>What?</strong>"
#         return txt

T = test()

T

class test(object):
    def __init__(self):
        pass
    
    def __repr__(self):
        "Lowest in the display order"
        txt = "2 + 2 = 4"
        return txt
    
    def _repr_png_(self):
        "Higher than text in the display order"
        with open("PNG_doc.resized.png",'rb') as f:
            txt = f.read()
        return txt
    
    def _repr_svg_(self):
        "Higher then text in the display order"
        txt = """<svg width="100" height="100">
  <circle cx="50" cy="50" r="40" stroke="green" stroke-width="4" fill="yellow" />
</svg>"""
        return txt

    def _repr_latex_(self):
        "Second highest in the display order"
        txt = "$$x^2 = 4$$"
        return txt
    
    def _repr_html_(self):
        "Highest in the display order"
        txt = ('<strong style="color:red">What?</strong><strong> .... </strong>'
               '<strong style="color:green">HTML is really the tops!</strong>')
        return txt

T = test()

T

from IPython.display import display_svg

display_svg(T)