Mark H Harris <harrismh...@gmail.com> Wrote in message: > greetings, I would like to create a lamda as follows: > > â = lambda n: sqrt(n) > > > On my keyboard mapping the "problem" character is alt-v which produces > the radical symbol. When trying to set the symbol as a name within the > name-space gives a syntax error: > > >>> from math import sqrt > >>> > >>> â = lambda n: sqrt(n) > SyntaxError: invalid character in identifier > >>> > >>> > > however this works: > > >>> > >>> λ = lambda n: sqrt(n) > >>> > >>> λ(2) > 1.4142135623730951 > >>> > > The question is which unicode(s) are capable of being proper name > characters, and which ones are off-limits, and why?
See the official docs http://docs.python.org/3/reference/lexical_analysis.html#identifiers There's also a method on str that'll tell you: isidentifier (). To see such methods, use dir ("") As for why, you can get a pretty good idea from the reference above, as it lists 12 unicode categories that can be used. You can also look at pep3131 and at Potsdam ' s site. Both links are on the above page. Letters, marks, connectors, and numbers, but not punctuation. -- DaveA
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