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diff --git a/docs/examples/tutorial/cython_tutorial/fib.pyx b/docs/examples/tutorial/cython_tutorial/fib.pyx
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+++ b/docs/examples/tutorial/cython_tutorial/fib.pyx
@@ -0,0 +1,10 @@
+from __future__ import print_function
+
+def fib(n):
+ """Print the Fibonacci series up to n."""
+ a, b = 0, 1
+ while b < n:
+ print(b, end=' ')
+ a, b = b, a + b
+
+ print()