[IPython-dev] cell magics

Jason Grout jason-sage@creativetrax....
Sat Feb 16 19:52:24 CST 2013


On 2/16/13 7:35 PM, Thomas Kluyver wrote:
> On 17 February 2013 01:26, Jason Grout <jason-sage@creativetrax.com
> <mailto:jason-sage@creativetrax.com>> wrote:
>
>     If you were going to use the name and the value, it would make sense
>     to do:
>
>     %R(input=['myvar'])
>
>
> Yep, that's functionally equivalent to what we do at present.
>
>     or even
>
>     %R(input='myvar')
>
>
> The list was to allow for multiple variables. You could have a special
> cased isinstance(input, str), but it's a bit unpythonic.
>


I see this syntax fairly often:

%R(input='myvar,othervar,thirdvar')

or

%R(input='myvar othervar thirdvar')

In fact, I got the code to parse that from the python library (IIRC):

input.replace(',', ' ').split()

So you could support:

* a string, variables delimited by commas or whitespace
* a list of strings
* a dictionary if you wanted to specify the R names

You could also do something like:

%R(myvar=myvar, othervar=othervar)

That's probably the most pythonic.

Thanks,

Jason



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