Gebruiker:WitchDoc/RomanRotate

Project: RomanRotate
RomanRotate
Naam	RomanRotate
Door	Stoneshop, Dvanzuijlekom, WitchDoc
Status	AF
Madskillz	Madness
Doel / Omschrijving
Roman numbering log rotation
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Small bit of python code to provide Roman numbered log rotation

#!/usr/bin/env python import sys import os import re import getopt def debug(argv): global verbose if verbose: print >>sys.stderr, "DBG: %s" % argv def dec2rom(input): """ Convert a decimal to Roman numerals. """ assert(isinstance(input, int)), "expected integer, got %s" % type(input) assert(0 < input < 4000), "Argument must be between 1 and 3999" ints = (1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1) nums = ('M', 'CM', 'D', 'CD','C', 'XC','L','XL','X','IX','V','IV','I') result = "" for i in range(len(ints)): count = int(input / ints[i]) result += nums[i] * count input -= ints[i] * count return result def rom2dec(input): """ Convert a roman numeral to a decimal. """ assert(isinstance(input, basestring)), "expected string, got %s" % type(input) assert(re.match(r'^[MDCLXVI]+$', input)), "not a valid roman numeral: %s" % input input = input.upper() nums = ['M', 'D', 'C', 'L', 'X', 'V', 'I'] ints = [1000, 500, 100, 50, 10, 5, 1] retValue = 0 for i in range(len(input)): value = ints[nums.index(input[i])] # If the next place holds a larger number, this value is negative. try: if ints[nums.index(input[i +1])] > value: value *= -1 except IndexError: # there is no next place. pass retValue += value # Easiest test for validity... if dec2rom(retValue) == input: return retValue else: raise ValueError, 'input is not a valid roman numeral: %s' % input def keys(value): if re.match(r'([MDCLXVI]+)', value): debug("Roman: %s, Decimal %s" % (value, rom2dec(value))) return((rom2dec(value), value)) else: return((value, dec2rom(value))) class FileList(set): def __init__(self, directory, filename): if(directory!=''): self._directory = directory else: self._directory = '.' self._filename = filename debug('Getting files for %s in directory %s' % (self._filename, self._directory)) for file in os.listdir(self._directory): try: parts = re.split(r'(%s\.)([MCXDVIL]+)' % self._filename, file) if len(parts) > 1: debug('Adding: %s' % file) self.add(keys(parts[2]) + (parts[1], file,)) except Exception, err: debug('Ignoring: %s' % file) pass if __name__ == "__main__": global verbose verbose = False listOnly = False optlist, args = getopt.getopt(sys.argv[1:], 'lhv') for option, value in optlist: if(option == '-v'): verbose = True if(option == '-l'): listOnly = True if(option == '-h'): usage() debug('Verbose is on') debug('Filenames: %s' % args) for item in args: debug('Processing: %s' % item) if listOnly: for file in sorted(FileList(os.path.dirname(item), os.path.basename(item)), key=lambda file: file[0]): print file[3] else: for file in sorted(FileList(os.path.dirname(item), os.path.basename(item)), key=lambda file: file[0], reverse=True): debug('renaming %s to %s.' % (file[3], "%s%s" % (file[2], dec2rom(file[0]+1)))) os.rename(file[3], "%s%s" % (file[2], dec2rom(file[0]+1)))