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Merge pull request #2231 from Carreau/ja...
Merge pull request #2231 from Carreau/ja Improve Image format validation and add html width,height This addresses the first two bullets of #2053 Validates first argument to constrain format to png, jpeg, Lets user specify width, height, or both and emits appropriate html I introduced a couple of class constants to minimize the number of times I saw 'jpeg' and 'png' and document the _ACCEPTABLE_FORMATS. I added one real jpeg image to the test directory and one zero-length gif file to survive the file not found error in super() Closes #2053 Add `assert_is_none`, `assert_is_not_none` to `nose.tools`
Fernando Perez - - Load All Authors

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test_exampleip.txt
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Tests in example form - IPython
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You can write text files with examples that use IPython prompts (as long as you
use the nose ipython doctest plugin), but you can not mix and match prompt
styles in a single file. That is, you either use all ``>>>`` prompts or all
IPython-style prompts. Your test suite *can* have both types, you just need to
put each type of example in a separate. Using IPython prompts, you can paste
directly from your session::
In [5]: s="Hello World"
In [6]: s.upper()
Out[6]: 'HELLO WORLD'
Another example::
In [8]: 1+3
Out[8]: 4
Just like in IPython docstrings, you can use all IPython syntax and features::
In [9]: !echo "hello"
hello
In [10]: a='hi'
In [11]: !echo $a
hi