make the prime number example work

chrisirhc · chrisirhc · commit 3c72c7a7f809 · 2024-06-21T06:52:46.000Z
python/mypy#17414
diff --git a/examples/mypy_lang_org_examples/prime_number_seive.py b/examples/mypy_lang_org_examples/prime_number_seive.py
@@ -7,7 +7,7 @@
 def iter_primes() -> Iterator[int]:
     # An iterator of all numbers between 2 and
     # +infinity
-    numbers = itertools.count(2)
+    numbers: Iterator[int] = itertools.count(2)
 
     # Generate primes forever
     while True:
