Questions about input lines (maximum length and continuation)
Hello, I'm planning to write a program which automatically generates Python code. (1) Is there a limit on the length of a line in a Python program? (2) From what I understand, symbols, operators, and numbers cannot be broken across lines continued with the backslash character. Is there any way to allow symbols, operators, and numbers to be broken across lines? Thanks a lot for any information. I appreciate your help. Robert Dodier -- http://mail.python.org/mailman/listinfo/python-list
Re: Combinatorics
Cameron Laird wrote: > Should combinatorics be part of the standard library? That's > an aesthetic-pragmatic question I don't feel competent to > answer; I look to timbot and Guido and so on for judgment there. > It does occur to me, though, that even more widely applicable > than the combinatorics module of Mathematica (if only because of > its licensing) might be such resources as [...] Well, since Mathematica has been mentioned, I'll go ahead and mention Maxima as well. Maxima is an open source (GPL) symbolic computation system, which includes some functions for combinatorics, among many other things. The relevant code is: http://maxima.cvs.sourceforge.net/maxima/maxima/src/nset.lisp (Oh, btw Maxima is written in Lisp.) The relevant documentation: http://maxima.sourceforge.net/docs/manual/en/maxima_37.html Sage can presumably access Maxima's combinatoric functions (since Sage bundles Maxima along with other programs). I don't know if there are combinatoric functions from other packages in Sage. FWIW Robert Dodier -- http://mail.python.org/mailman/listinfo/python-list
How to split a string containing nested commas-separated substrings
Hello, I'd like to split a string by commas, but only at the "top level" so to speak. An element can be a comma-less substring, or a quoted string, or a substring which looks like a function call. If some element contains commas, I don't want to split it. Examples: 'foo, bar, baz' => 'foo' 'bar' 'baz' 'foo, "bar, baz", blurf' => 'foo' 'bar, baz' 'blurf' 'foo, bar(baz, blurf), mumble' => 'foo' 'bar(baz, blurf)' 'mumble' Can someone suggest a suitable regular expression or other method to split such strings? Thank you very much for your help. Robert -- http://mail.python.org/mailman/listinfo/python-list
trying to find repeated substrings with regular expression
Hello all, I'm trying to find substrings that look like 'FOO blah blah blah' in a string. For example give 'blah FOO blah1a blah1b FOO blah2 FOO blah3a blah3b blah3b' I want to get three substrings, 'FOO blah1a blah1b', 'FOO blah2', and 'FOO blah3a blah3b blah3b'. I've tried numerous variations on '.*(FOO((?!FOO).)*)+.*' and everything I've tried either matches too much or too little. I've decided it's easier for me just to search for FOO, and then break up the string based on the locations of FOO. But I'd like to better understand regular expressions. Can someone suggest a regular expression which will return groups corresponding to the FOO substrings above? Thanks for any insights, I appreciate it a lot. Robert Dodier -- http://mail.python.org/mailman/listinfo/python-list
