3 # Copyright (C) 2011-2013 Simon Ruderich
5 # This program is free software: you can redistribute it and/or modify
6 # it under the terms of the GNU General Public License as published by
7 # the Free Software Foundation, either version 3 of the License, or
8 # (at your option) any later version.
10 # This program is distributed in the hope that it will be useful,
11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 # GNU General Public License for more details.
15 # You should have received a copy of the GNU General Public License
16 # along with this program. If not, see <http://www.gnu.org/licenses/>.
28 return reduce(lambda a,b: a*(n-b)/(b+1),xrange(k),1)
30 # Convert number to scientific notation (e.g. 5e6).
35 # Time/Date functions.
38 # Convert time in seconds since epoch to readable string.
40 print time.strftime("%Y-%m-%d %H:%M:%S", time.localtime(seconds))
43 print "Welcome to the ultimate calculator."'