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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.
-h, --help
Show an help message.
LICENSE
-------
"""
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 a yaml in a string or 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 yaml to a file-like object"""
json.dump(self.stats,fp)
def generate_name(self):
"""Generate a name following the stats"""
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()
|
