import itertools
from math import log10
import os
+import importlib.resources as pkg_resources
import szyfrow.support.norms
-from szyfrow.support.utilities import sanitise
+from szyfrow.support.utilities import sanitise, deduplicate
+from szyfrow import language_model_files
+
def datafile(name, sep='\t'):
"""Read key,value pairs from file.
"""
- with open(os.path.join(os.path.dirname(os.path.realpath(__file__)), name), 'r') as f:
+ with pkg_resources.open_text(language_model_files, name) as f:
+ # with open(p name), 'r') as f:
for line in f:
splits = line.split(sep)
yield [splits[0], int(splits[1])]
english_trigram_counts = collections.Counter(dict(datafile('count_3l.txt')))
normalised_english_trigram_counts = szyfrow.support.norms.normalise(english_trigram_counts)
-with open(os.path.join(os.path.dirname(os.path.realpath(__file__)), 'words.txt'), 'r') as f:
+with pkg_resources.open_text(language_model_files, 'words.txt') as f:
keywords = [line.rstrip() for line in f]
+def transpositions_of(keyword):
+ """Finds the transpostions given by a keyword. For instance, the keyword
+ 'clever' rearranges to 'celrv', so the first column (0) stays first, the
+ second column (1) moves to third, the third column (2) moves to second,
+ and so on.
+
+ If passed a tuple, assume it's already a transposition and just return it.
+
+ >>> transpositions_of('clever')
+ (0, 2, 1, 4, 3)
+ >>> transpositions_of('fred')
+ (3, 2, 0, 1)
+ >>> transpositions_of((3, 2, 0, 1))
+ (3, 2, 0, 1)
+ """
+ if isinstance(keyword, tuple):
+ return keyword
+ else:
+ key = deduplicate(keyword)
+ transpositions = tuple(key.index(l) for l in sorted(key))
+ return transpositions
+
+transpositions = collections.defaultdict(list)
+for word in keywords:
+ transpositions[transpositions_of(word)] += [word]
+
+
def weighted_choice(d):
"""Generate random item from a dictionary of item counts
"""