#! /usr/bin/env python # 2)  Sorting Test##     Sort an input file that consists of lines like this##         var1=23 other=14 ditto=23 fred=2##     such that each output line is sorted WRT to the number.  Order#     of output lines does not change.  Resolve collisions using the#     variable name.   e.g.##         fred=2 other=14 ditto=23 var1=23##     Lines may be up to several kilobytes in length and contain#     zillions of variables. # This implementation:# - Reads stdin, writes stdout# - Uses any amount of whitespace to separate fields# - Allows signed numbers# - Treats illegally formatted fields as field=0# - Outputs the sorted fields with exactly one space between them# - Handles blank input lines correctly import reimport stringimport sys def main():    prog = re.compile('^(.*)=([-+]?[0-9]+)')    def makekey(item, prog=prog):        match = prog.match(item)        if match:            var, num = match.group(1, 2)            return string.atoi(num), var        else:            # Bad input -- pretend it's a var with value 0            return 0, item    while 1:        line = sys.stdin.readline()        if not line:            break        items = line.split()        items = map(makekey, items)        items.sort()        for num, var in items:            print "%s=%s" % (var, num),        print main()