python - Adding syntax to IPython? -


i add syntax changes (my installation of) ipython. example, might want use \+ mean operator.add. imagine can insert code process input , turn actual (i)python, , ipython can own processing. don't know put code.

(disclaimer: don't production code, or code that's intended other people see/use.)

here example of how transform "\+ b" "a + b".

from ipython.core.inputtransformer import statelessinputtransformer  @statelessinputtransformer.wrap def my_filter(line):     words = line.split()     if line.startswith(r'\+ ') , len(words) == 3:         return '{} + {}'.format(*words[1:])     return line  ip = get_ipython() ip.input_transformer_manager.physical_line_transforms.insert(0, my_filter())

note string based. hook executes in unevaluated context. means can't conditional transformation based on value a or b. magic best suit need in case.

moreover, have careful when parsing input string. in example, following broken \+ (a * b) c because of split. in case, need tokenization tool. ipython provides 1 tokeninputtransformer. works statelessinputtransformer called list of tokens instead of whole line.

simply run code add filter. if want available start ipython, can save .py or .ipy file , put in ~/.ipython/profile_*/startup

https://ipython.org/ipython-doc/dev/config/inputtransforms.html


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