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#!/usr/bin/env python2
"""
namegen.py
==========
---------------------
random name generator
---------------------
:Authors: Elena ``of Valhalla'' Grandi, Diego Roversi
:Date: 2011-09-11
:Copyright: 2011 Elena Grandi, Diego Roversi
:Version: 0.20110911
:Manual Section: 1
SYNOPSIS
--------
namegen.py (-s <stat_file>)|(-l <list_file>) [-S <dest_file>] [-n <n>]
DESCRIPTION
-----------
OPTIONS
-------
-s <stat_file>, --stats=<stat_file>
Load rules from <stat_file>.
-l <list_file>, --list=<list_file>
Generate rules from the files in <list_file>.
-S <dest_file>, --save_stats=<dest_file>
Save stats in <dest_file>.
-n <n>, --number=<n>
Generate <n> names (0 to generate no name).
-c <n>, --context=<n>
Use <n> characters of context in the stats (ignored when loading
existing stats).
-h, --help
Show an help message.
LICENSE
-------
Copyright (c) 2011, Elena Grandi, Diego Roversi
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
* Neither the name of the <organization> nor the
names of its contributors may be used to endorse or promote products
derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
"""
import json
import optparse
import sys
import random
class Stats:
def __init__(self,context):
""""""
self.stats = {}
self.context = context
def _increment_stats(self,cont,key):
if cont in self.stats:
if key in self.stats[cont]:
self.stats[cont][key] += 1
else:
self.stats[cont][key] = 1
else:
self.stats[cont] = {key: 1}
def read_names(self,fp):
"""Calculate stats from a list of names in a file-like object."""
for name in fp.readlines():
name = name.decode('utf-8')
for i in xrange(min(self.context,len(name))):
self._increment_stats(name[0:i],name[i])
for i in xrange(self.context,len(name)):
self._increment_stats(name[i-self.context:i],name[i])
def load_stats(self,fp):
"""Load stats from json in a file-like object."""
self.stats = json.load(fp)
self.context = max([len(k) for k in self.stats.keys()])
def save_stats(self,fp):
"""Save stats in json to a file-like object."""
json.dump(self.stats,fp)
def generate_name(self):
"""Generate a name."""
name = ''
c = ''
while c != '\n':
if len(name) <= self.context:
cont = name
else:
cont = name[-self.context:]
chars = ''.join([k*self.stats[cont][k] for k in self.stats[cont]])
c = random.choice(chars)
name += c
return name
def main():
parser = optparse.OptionParser()
parser.add_option('--stats','-s')
parser.add_option('--list','-l')
parser.add_option('--save-stats','-S')
parser.add_option('--number','-n')
parser.add_option('--context','-c')
opt, arg = parser.parse_args()
if opt.stats == None and opt.list == None:
parser.print_help()
sys.exit(1)
try:
mystats = Stats(int(opt.context))
except TypeError:
mystats = Stats(3)
need_list = True
try:
fp = open(opt.stats)
except IOError:
sys.stderr.write("Could not open "+opt.stats+" for reading.\n")
except TypeError:
pass
else:
try:
mystats.load_stats(fp)
need_list = False
except ValueError:
sys.stderr.write(opt.stats+" is not a valid stats file.\n")
finally:
fp.close()
if need_list:
try:
fp = open(opt.list)
except IOError:
sys.stderr.write("Could not open "+opt.list+" for reading.\n")
sys.exit(1)
except TypeError:
parser.print_help()
sys.exit(1)
else:
try:
mystats.read_names(fp)
except IOError:
sys.stderr.write(opt.list+" is not a valid name list file.\n")
sys.exit(1)
finally:
fp.close()
try:
fp = open(opt.save_stats,'wb')
except TypeError:
pass
except IOError:
sys.stderr.write("Warning: could not save stats data on file "+
opt.save_stats+"\n")
else:
try:
mystats.save_stats(fp)
except IOError:
sys.stderr.write("Warning: could not save stats data on file "+
opt.save_stats+"\n")
finally:
fp.close()
try:
n = int(opt.number)
except (TypeError, ValueError):
n = 1
for i in xrange(n):
print mystats.generate_name(),
if __name__ == '__main__': main()
|
