On Thu, 04 Jul 2013 17:54:20 +0100, Rotwang wrote: [...] > Anyway, none of the calculations that has been given takes into account > the fact that names can be /less/ than one million characters long.
Not in *my* code they don't!!! *wink* > The > actual number of non-empty strings of length at most 1000000 characters, > that consist only of ascii letters, digits or underscores, and that > don't start with a digit, is > > sum(53*63**i for i in range(1000000)) == 53*(63**1000000 - 1)//62 I take my hat of to you sir, or possibly madam. That is truly an inspired piece of pedantry. > It's perhaps worth mentioning that some non-ascii characters are allowed > in identifiers in Python 3, though I don't know which ones. PEP 3131 describes the rules: http://www.python.org/dev/peps/pep-3131/ For example: py> import unicodedata as ud py> for c in 'é極¿μЖᚃ‰⇄∞': ... print(c, ud.name(c), c.isidentifier(), ud.category(c)) ... é LATIN SMALL LETTER E WITH ACUTE True Ll æ LATIN SMALL LETTER AE True Ll ¥ YEN SIGN False Sc µ MICRO SIGN True Ll ¿ INVERTED QUESTION MARK False Po μ GREEK SMALL LETTER MU True Ll Ж CYRILLIC CAPITAL LETTER ZHE True Lu ᚃ OGHAM LETTER FEARN True Lo ‰ PER MILLE SIGN False Po ⇄ RIGHTWARDS ARROW OVER LEFTWARDS ARROW False So ∞ INFINITY False Sm -- Steven -- http://mail.python.org/mailman/listinfo/python-list
