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+doctests = """
+########### Tests borrowed from or inspired by test_genexps.py ############
+
+Test simple loop with conditional
+
+ >>> sum([i*i for i in range(100) if i&1 == 1])
+ 166650
+
+Test simple nesting
+
+ >>> [(i,j) for i in range(3) for j in range(4)]
+ [(0, 0), (0, 1), (0, 2), (0, 3), (1, 0), (1, 1), (1, 2), (1, 3), (2, 0), (2, 1), (2, 2), (2, 3)]
+
+Test nesting with the inner expression dependent on the outer
+
+ >>> [(i,j) for i in range(4) for j in range(i)]
+ [(1, 0), (2, 0), (2, 1), (3, 0), (3, 1), (3, 2)]
+
+Make sure the induction variable is not exposed
+
+ >>> i = 20
+ >>> sum([i*i for i in range(100)])
+ 328350
+
+ >>> i
+ 20
+
+Verify that syntax error's are raised for listcomps used as lvalues
+
+ >>> [y for y in (1,2)] = 10 # doctest: +IGNORE_EXCEPTION_DETAIL
+ Traceback (most recent call last):
+ ...
+ SyntaxError: ...
+
+ >>> [y for y in (1,2)] += 10 # doctest: +IGNORE_EXCEPTION_DETAIL
+ Traceback (most recent call last):
+ ...
+ SyntaxError: ...
+
+
+########### Tests borrowed from or inspired by test_generators.py ############
+
+Make a nested list comprehension that acts like range()
+
+ >>> def frange(n):
+ ... return [i for i in xrange(n)]
+ >>> frange(10)
+ [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
+
+Same again, only as a lambda expression instead of a function definition
+
+ >>> lrange = lambda n: [i for i in xrange(n)]
+ >>> lrange(10)
+ [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
+
+Generators can call other generators:
+
+ >>> def grange(n):
+ ... for x in [i for i in xrange(n)]:
+ ... yield x
+ >>> list(grange(5))
+ [0, 1, 2, 3, 4]
+
+
+Make sure that None is a valid return value
+
+ >>> [None for i in xrange(10)]
+ [None, None, None, None, None, None, None, None, None, None]
+
+########### Tests for various scoping corner cases ############
+
+Return lambdas that use the iteration variable as a default argument
+
+ >>> items = [(lambda i=i: i) for i in range(5)]
+ >>> [x() for x in items]
+ [0, 1, 2, 3, 4]
+
+Same again, only this time as a closure variable
+
+ >>> items = [(lambda: i) for i in range(5)]
+ >>> [x() for x in items]
+ [4, 4, 4, 4, 4]
+
+Another way to test that the iteration variable is local to the list comp
+
+ >>> items = [(lambda: i) for i in range(5)]
+ >>> i = 20
+ >>> [x() for x in items]
+ [4, 4, 4, 4, 4]
+
+And confirm that a closure can jump over the list comp scope
+
+ >>> items = [(lambda: y) for i in range(5)]
+ >>> y = 2
+ >>> [x() for x in items]
+ [2, 2, 2, 2, 2]
+
+We also repeat each of the above scoping tests inside a function
+
+ >>> def test_func():
+ ... items = [(lambda i=i: i) for i in range(5)]
+ ... return [x() for x in items]
+ >>> test_func()
+ [0, 1, 2, 3, 4]
+
+ >>> def test_func():
+ ... items = [(lambda: i) for i in range(5)]
+ ... return [x() for x in items]
+ >>> test_func()
+ [4, 4, 4, 4, 4]
+
+ >>> def test_func():
+ ... items = [(lambda: i) for i in range(5)]
+ ... i = 20
+ ... return [x() for x in items]
+ >>> test_func()
+ [4, 4, 4, 4, 4]
+
+ >>> def test_func():
+ ... items = [(lambda: y) for i in range(5)]
+ ... y = 2
+ ... return [x() for x in items]
+ >>> test_func()
+ [2, 2, 2, 2, 2]
+
+"""
+
+
+__test__ = {'doctests' : doctests}
+
+def test_main(verbose=None):
+ import sys
+ from test import test_support
+ from test import test_listcomps
+ test_support.run_doctest(test_listcomps, verbose)
+
+ # verify reference counting
+ if verbose and hasattr(sys, "gettotalrefcount"):
+ import gc
+ counts = [None] * 5
+ for i in xrange(len(counts)):
+ test_support.run_doctest(test_genexps, verbose)
+ gc.collect()
+ counts[i] = sys.gettotalrefcount()
+ print(counts)
+
+if __name__ == "__main__":
+ test_main(verbose=True)
+doctests = """
+########### Tests borrowed from or inspired by test_genexps.py ############
+
+Test simple loop with conditional
+
+ >>> sum([i*i for i in range(100) if i&1 == 1])
+ 166650
+
+Test simple nesting
+
+ >>> [(i,j) for i in range(3) for j in range(4)]
+ [(0, 0), (0, 1), (0, 2), (0, 3), (1, 0), (1, 1), (1, 2), (1, 3), (2, 0), (2, 1), (2, 2), (2, 3)]
+
+Test nesting with the inner expression dependent on the outer
+
+ >>> [(i,j) for i in range(4) for j in range(i)]
+ [(1, 0), (2, 0), (2, 1), (3, 0), (3, 1), (3, 2)]
+
+Make sure the induction variable is not exposed
+
+ >>> i = 20
+ >>> sum([i*i for i in range(100)])
+ 328350
+
+ >>> i
+ 20
+
+Verify that syntax error's are raised for listcomps used as lvalues
+
+ >>> [y for y in (1,2)] = 10 # doctest: +IGNORE_EXCEPTION_DETAIL
+ Traceback (most recent call last):
+ ...
+ SyntaxError: ...
+
+ >>> [y for y in (1,2)] += 10 # doctest: +IGNORE_EXCEPTION_DETAIL
+ Traceback (most recent call last):
+ ...
+ SyntaxError: ...
+
+
+########### Tests borrowed from or inspired by test_generators.py ############
+
+Make a nested list comprehension that acts like range()
+
+ >>> def frange(n):
+ ... return [i for i in xrange(n)]
+ >>> frange(10)
+ [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
+
+Same again, only as a lambda expression instead of a function definition
+
+ >>> lrange = lambda n: [i for i in xrange(n)]
+ >>> lrange(10)
+ [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
+
+Generators can call other generators:
+
+ >>> def grange(n):
+ ... for x in [i for i in xrange(n)]:
+ ... yield x
+ >>> list(grange(5))
+ [0, 1, 2, 3, 4]
+
+
+Make sure that None is a valid return value
+
+ >>> [None for i in xrange(10)]
+ [None, None, None, None, None, None, None, None, None, None]
+
+########### Tests for various scoping corner cases ############
+
+Return lambdas that use the iteration variable as a default argument
+
+ >>> items = [(lambda i=i: i) for i in range(5)]
+ >>> [x() for x in items]
+ [0, 1, 2, 3, 4]
+
+Same again, only this time as a closure variable
+
+ >>> items = [(lambda: i) for i in range(5)]
+ >>> [x() for x in items]
+ [4, 4, 4, 4, 4]
+
+Another way to test that the iteration variable is local to the list comp
+
+ >>> items = [(lambda: i) for i in range(5)]
+ >>> i = 20
+ >>> [x() for x in items]
+ [4, 4, 4, 4, 4]
+
+And confirm that a closure can jump over the list comp scope
+
+ >>> items = [(lambda: y) for i in range(5)]
+ >>> y = 2
+ >>> [x() for x in items]
+ [2, 2, 2, 2, 2]
+
+We also repeat each of the above scoping tests inside a function
+
+ >>> def test_func():
+ ... items = [(lambda i=i: i) for i in range(5)]
+ ... return [x() for x in items]
+ >>> test_func()
+ [0, 1, 2, 3, 4]
+
+ >>> def test_func():
+ ... items = [(lambda: i) for i in range(5)]
+ ... return [x() for x in items]
+ >>> test_func()
+ [4, 4, 4, 4, 4]
+
+ >>> def test_func():
+ ... items = [(lambda: i) for i in range(5)]
+ ... i = 20
+ ... return [x() for x in items]
+ >>> test_func()
+ [4, 4, 4, 4, 4]
+
+ >>> def test_func():
+ ... items = [(lambda: y) for i in range(5)]
+ ... y = 2
+ ... return [x() for x in items]
+ >>> test_func()
+ [2, 2, 2, 2, 2]
+
+"""
+
+
+__test__ = {'doctests' : doctests}
+
+def test_main(verbose=None):
+ import sys
+ from test import test_support
+ from test import test_listcomps
+ test_support.run_doctest(test_listcomps, verbose)
+
+ # verify reference counting
+ if verbose and hasattr(sys, "gettotalrefcount"):
+ import gc
+ counts = [None] * 5
+ for i in xrange(len(counts)):
+ test_support.run_doctest(test_genexps, verbose)
+ gc.collect()
+ counts[i] = sys.gettotalrefcount()
+ print(counts)
+
+if __name__ == "__main__":
+ test_main(verbose=True)
+doctests = """
+########### Tests borrowed from or inspired by test_genexps.py ############
+
+Test simple loop with conditional
+
+ >>> sum([i*i for i in range(100) if i&1 == 1])
+ 166650
+
+Test simple nesting
+
+ >>> [(i,j) for i in range(3) for j in range(4)]
+ [(0, 0), (0, 1), (0, 2), (0, 3), (1, 0), (1, 1), (1, 2), (1, 3), (2, 0), (2, 1), (2, 2), (2, 3)]
+
+Test nesting with the inner expression dependent on the outer
+
+ >>> [(i,j) for i in range(4) for j in range(i)]
+ [(1, 0), (2, 0), (2, 1), (3, 0), (3, 1), (3, 2)]
+
+Make sure the induction variable is not exposed
+
+ >>> i = 20
+ >>> sum([i*i for i in range(100)])
+ 328350
+
+ >>> i
+ 20
+
+Verify that syntax error's are raised for listcomps used as lvalues
+
+ >>> [y for y in (1,2)] = 10 # doctest: +IGNORE_EXCEPTION_DETAIL
+ Traceback (most recent call last):
+ ...
+ SyntaxError: ...
+
+ >>> [y for y in (1,2)] += 10 # doctest: +IGNORE_EXCEPTION_DETAIL
+ Traceback (most recent call last):
+ ...
+ SyntaxError: ...
+
+
+########### Tests borrowed from or inspired by test_generators.py ############
+
+Make a nested list comprehension that acts like range()
+
+ >>> def frange(n):
+ ... return [i for i in xrange(n)]
+ >>> frange(10)
+ [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
+
+Same again, only as a lambda expression instead of a function definition
+
+ >>> lrange = lambda n: [i for i in xrange(n)]
+ >>> lrange(10)
+ [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
+
+Generators can call other generators:
+
+ >>> def grange(n):
+ ... for x in [i for i in xrange(n)]:
+ ... yield x
+ >>> list(grange(5))
+ [0, 1, 2, 3, 4]
+
+
+Make sure that None is a valid return value
+
+ >>> [None for i in xrange(10)]
+ [None, None, None, None, None, None, None, None, None, None]
+
+########### Tests for various scoping corner cases ############
+
+Return lambdas that use the iteration variable as a default argument
+
+ >>> items = [(lambda i=i: i) for i in range(5)]
+ >>> [x() for x in items]
+ [0, 1, 2, 3, 4]
+
+Same again, only this time as a closure variable
+
+ >>> items = [(lambda: i) for i in range(5)]
+ >>> [x() for x in items]
+ [4, 4, 4, 4, 4]
+
+Another way to test that the iteration variable is local to the list comp
+
+ >>> items = [(lambda: i) for i in range(5)]
+ >>> i = 20
+ >>> [x() for x in items]
+ [4, 4, 4, 4, 4]
+
+And confirm that a closure can jump over the list comp scope
+
+ >>> items = [(lambda: y) for i in range(5)]
+ >>> y = 2
+ >>> [x() for x in items]
+ [2, 2, 2, 2, 2]
+
+We also repeat each of the above scoping tests inside a function
+
+ >>> def test_func():
+ ... items = [(lambda i=i: i) for i in range(5)]
+ ... return [x() for x in items]
+ >>> test_func()
+ [0, 1, 2, 3, 4]
+
+ >>> def test_func():
+ ... items = [(lambda: i) for i in range(5)]
+ ... return [x() for x in items]
+ >>> test_func()
+ [4, 4, 4, 4, 4]
+
+ >>> def test_func():
+ ... items = [(lambda: i) for i in range(5)]
+ ... i = 20
+ ... return [x() for x in items]
+ >>> test_func()
+ [4, 4, 4, 4, 4]
+
+ >>> def test_func():
+ ... items = [(lambda: y) for i in range(5)]
+ ... y = 2
+ ... return [x() for x in items]
+ >>> test_func()
+ [2, 2, 2, 2, 2]
+
+"""
+
+
+__test__ = {'doctests' : doctests}
+
+def test_main(verbose=None):
+ import sys
+ from test import test_support
+ from test import test_listcomps
+ test_support.run_doctest(test_listcomps, verbose)
+
+ # verify reference counting
+ if verbose and hasattr(sys, "gettotalrefcount"):
+ import gc
+ counts = [None] * 5
+ for i in xrange(len(counts)):
+ test_support.run_doctest(test_genexps, verbose)
+ gc.collect()
+ counts[i] = sys.gettotalrefcount()
+ print(counts)
+
+if __name__ == "__main__":
+ test_main(verbose=True)
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