'''
According to my expectations, the three functions in this code below should all
produce the same result. I've been stunned to discover that this is not the case.
'''
def test1():
for i in range(5):
def call(): return i
yield call
def test2():
all = []
for i in range(5):
def call(): return i
all.append(call)
return all
def test3():
def MakeCall(i):
def call(): return i
return call
all = []
for i in range(5):
all.append(MakeCall(i))
return all
print
for test in [ test1, test2, test3 ]:
print test.__name__, ':', [ f() for f in test() ]
expected_output = '''
test1 : [0, 1, 2, 3, 4]
test2 : [0, 1, 2, 3, 4]
test3 : [0, 1, 2, 3, 4]
'''
actual_output = '''
test1 : [0, 1, 2, 3, 4]
test2 : [4, 4, 4, 4, 4] # <= this is the stunning thing !!!
test3 : [0, 1, 2, 3, 4]
'''
