[IPython-dev] Curly braces stripped from magic input

[Greg Wilson]

On 2013-08-31 2:21 PM, Thomas Kluyver wrote:
> On 31 August 2013 10:07, Matt Davis <jiffyclub at gmail.com 
> <mailto:jiffyclub at gmail.com>> wrote:
>
>     Is there any way around this, or do we just have to tell our
>     students to use \d{{3,4}} instead of valid regex?
>
>
> No, I don't think we currently have any way to disable this. You may 
> prefer to declare regexes in regular Python code rather than within 
> IPython magic commands.
Hi Thomas,
The point of this tool is to allow us to teach regular expressions 
*without* having to embed them in Python (or anything else) --- we've 
found they're easier for newcomers to digest if they can wrap their 
heads around \d+\s+\d+\b first, and then worry about raw strings, 
re.whatever, match objects, and so on.  What we have now lets us do this:

%%regex a+b
xyz
aaabxx
xabbbx
xyzab
xabxabx

which is about as simple as it can get.  We can tell them to double the 
{}'s if we have to, but it seems weird not to have access to the 
original (unchomped) string...
Thanks,
Greg
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