Data commit

Task/Emirp-primes/Python/emirp-primes.py

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+from __future__ import print_function
+from prime_decomposition import primes, is_prime
+from heapq import *
+from itertools import islice
+
+def emirp():
+    largest = set()
+    emirps = []
+    heapify(emirps)
+    for pr in primes():
+        while emirps and pr > emirps[0]:
+            yield heappop(emirps)
+        if pr in largest:
+            yield pr
+        else:
+            rp = int(str(pr)[::-1])
+            if rp > pr and is_prime(rp):
+                heappush(emirps, pr)
+                largest.add(rp)
+
+print('First 20:\n  ', list(islice(emirp(), 20)))
+print('Between 7700 and 8000:\n  [', end='')
+for pr in emirp():
+    if pr >= 8000: break
+    if pr >= 7700: print(pr, end=', ')
+print(']')
+print('10000th:\n  ', list(islice(emirp(), 10000-1, 10000)))