tasks a-s

Task/Semordnilap/Python/semordnilap-1.py

@@ -0,0 +1,11 @@
+>>> with open('unixdict.txt') as f:
+	wordset = set(f.read().strip().split())
+
+>>> revlist = (''.join(word[::-1]) for word in wordset)
+>>> pairs   = set((wrd, rev) for wrd, rev in zip(wordset, revlist)
+                  if wrd < rev and rev in wordset)
+>>> len(pairs)
+158
+>>> sorted(pairs, key=lambda p: (len(p[0]), p))[-5:]
+[('damon', 'nomad'), ('lager', 'regal'), ('leper', 'repel'), ('lever', 'revel'), ('kramer', 'remark')]
+>>>

Task/Semordnilap/Python/semordnilap-2.py

@@ -0,0 +1,16 @@
+import os
+import random
+# Load file and put it to dictionary as set
+dictionary = {word.rstrip(os.linesep) for word in open('unixdict.txt')}
+
+# List of results
+results = []
+for word in dictionary:
+    # [::-1] reverses string
+    reversed_word = word[::-1]
+    if reversed_word in dictionary and word > reversed_word:
+        results.append((word, reversed_word))
+
+print(len(results))
+for words in random.sample(results, 5):
+    print(' '.join(words))