Andrew Dalke:(BTW, it needs to be 1 .. 12 not 1..12 because 1. will be interpreted as the floating point value "1.0".)<Uhm, I have to fix my ignorance about parsers. Cannot a second "." after the first tell that the first "." isn't in the middle of a floating point number?
Python uses an LL(1) parser. From Wikipedia:
""" LL(1) grammars, although fairly restrictive, are very popular because the corresponding LL parsers only need to look at the next token to make their parsing decisions."""
This may allow: assert 5 interval 9 == interval(5,9)Maybe you could give an example of when you need this in real life?<Every time you have a function with 2 parameters, you can choose to use it infix.
But why would you want to? What advantage does this give over the standard syntax? Remember, in Python philosophy, there should be one obvious way to do it, and preferably only one. Adding a whole another way of calling functions complicates things without adding much advantage. Especially so because you suggest it is only used for binary, i.e. two-parameter functions.
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