Demystifying Python Descriptors
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<style> | |
@font-face { | |
font-family: "Computer Modern"; | |
src: url('http://mirrors.ctan.org/fonts/cm-unicode/fonts/otf/cmunss.otf'); | |
} | |
div.cell{ | |
width:800px; | |
margin-left:16% !important; | |
margin-right:auto; | |
} | |
h1 { | |
font-family: Helvetica, serif; | |
} | |
h4{ | |
margin-top:12px; | |
margin-bottom: 3px; | |
} | |
div.text_cell_render{ | |
font-family: Computer Modern, "Helvetica Neue", Arial, Helvetica, Geneva, sans-serif; | |
line-height: 145%; | |
font-size: 130%; | |
width:800px; | |
margin-left:auto; | |
margin-right:auto; | |
} | |
div.text_cell_render li { | |
line-height: 145%; | |
} | |
div.text_cell_render code { | |
color: rgb(40, 114, 43); | |
font-family: "Source Code Pro", source-code-pro,Consolas, monospace; | |
font-size: 80%; | |
} | |
.CodeMirror{ | |
font-family: "Source Code Pro", source-code-pro,Consolas, monospace; | |
} | |
.prompt{ | |
display: None; | |
} | |
.text_cell_render h5 { | |
font-weight: 300; | |
font-size: 16pt; | |
color: #4057A1; | |
font-style: italic; | |
margin-bottom: .5em; | |
margin-top: 0.5em; | |
display: block; | |
} | |
.warning{ | |
color: rgb( 240, 20, 20 ) | |
} | |
</style> | |
<script> | |
MathJax.Hub.Config({ | |
TeX: { | |
extensions: ["AMSmath.js"] | |
}, | |
tex2jax: { | |
inlineMath: [ ['$','$'], ["\\(","\\)"] ], | |
displayMath: [ ['$$','$$'], ["\\[","\\]"] ] | |
}, | |
displayAlign: 'center', // Change this to 'center' to center equations. | |
"HTML-CSS": { | |
styles: {'.MathJax_Display': {"margin": 4}} | |
} | |
}); | |
</script> |
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@ChrisBeaumont, @jaimefrio The link seems to be wrong again. ;-). I think the correct link is: https://mail.python.org/pipermail/python-list/2012-January/618572.html
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@ChrisBeaumont i observed a typo in the following code fragment. "-1" value needs to be changed to "-100"
m = Movie('Casablanca', 97, 102, 964000, 1300000) print m.budget # calls Movie.budget.__get__(m, Movie) m.rating = 100 # calls Movie.budget.__set__(m, 100) try: m.rating = -1 # calls Movie.budget.__set__(m, -100) except ValueError: print "Woops, negative value"