update from Atlas repo

iterables/yield_delegate_fail.py

@@ -0,0 +1,29 @@
+""" Example from `Python: The Full Monty`__ -- A Tested Semantics for the
+Python Programming Language
+
+__ http://cs.brown.edu/~sk/Publications/Papers/Published/pmmwplck-python-full-monty/
+
+"The following program, [...] seems to perform a simple abstraction over the
+process of yielding:"
+
+Citation:
+
+Joe Gibbs Politz, Alejandro Martinez, Matthew Milano, Sumner Warren,
+Daniel Patterson, Junsong Li, Anand Chitipothu, and Shriram Krishnamurthi.
+2013. Python: the full monty. SIGPLAN Not. 48, 10 (October 2013), 217-232.
+DOI=10.1145/2544173.2509536 http://doi.acm.org/10.1145/2544173.2509536
+"""
+
+# BEGIN YIELD_DELEGATE_FAIL
+def f():
+    def do_yield(n):
+        yield n
+    x = 0
+    while True:
+        x += 1
+        do_yield(x)
+# END YIELD_DELEGATE_FAIL
+
+if __name__ == '__main__':
+    print('Invoking f() results in an infinite loop')
+    f()