On Aug 6, 1:55 pm, Tommy Grav <[EMAIL PROTECTED]> wrote: > I have a file with the format > > Field f29227: Ra=20:23:46.54 Dec=+67:30:00.0 MJD=53370.06797690 Frames > 5 Set 1 > Field f31448: Ra=20:24:58.13 Dec=+79:39:43.9 MJD=53370.06811620 Frames > 5 Set 2 > Field f31226: Ra=20:24:45.50 Dec=+78:26:45.2 MJD=53370.06823860 Frames > 5 Set 3 > Field f31004: Ra=20:25:05.28 Dec=+77:13:46.9 MJD=53370.06836020 Frames > 5 Set 4 > Field f30782: Ra=20:25:51.94 Dec=+76:00:48.6 MJD=53370.06848210 Frames > 5 Set 5 > Field f30560: Ra=20:27:01.82 Dec=+74:47:50.3 MJD=53370.06860400 Frames > 5 Set 6 > Field f30338: Ra=20:28:32.35 Dec=+73:34:52.0 MJD=53370.06872620 Frames > 5 Set 7 > Field f30116: Ra=20:30:21.70 Dec=+72:21:53.6 MJD=53370.06884890 Frames > 5 Set 8 > Field f29894: Ra=20:32:28.54 Dec=+71:08:55.0 MJD=53370.06897070 Frames > 5 Set 9 > Field f29672: Ra=20:34:51.89 Dec=+69:55:56.6 MJD=53370.06909350 Frames > 5 Set 10 > > I would like to parse this file by extracting the field id, ra, dec > and mjd for each line. It is > not, however, certain that the width of each value of the field id, > ra, dec or mjd is the same > in each line. Is there a way to do this such that even if there was a > line where Ra=****** and > MJD=******** was swapped it would be parsed correctly? > > Cheers > Tommy
I'm sure Python can handle this. Try the PyParsing module or learn Python regular expression syntax. http://pyparsing.wikispaces.com/ You could probably do it very crudely by just iterating over each line and then using the string's find() method. Mike -- http://mail.python.org/mailman/listinfo/python-list
