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# test user defined iterators
# this class is not iterable
class NotIterable:
pass
try:
for i in NotIterable():
pass
except TypeError:
print('TypeError')
# this class has no __next__ implementation
class NotIterable:
def __iter__(self):
return self
try:
print(all(NotIterable()))
except TypeError:
print('TypeError')
class MyStopIteration(StopIteration):
pass
class myiter:
def __init__(self, i):
self.i = i
def __iter__(self):
return self
def __next__(self):
if self.i <= 0:
# stop in the usual way
raise StopIteration
elif self.i == 10:
# stop with an argument
raise StopIteration(42)
elif self.i == 20:
# raise a non-stop exception
raise TypeError
elif self.i == 30:
# raise a user-defined stop iteration
print('raising MyStopIteration')
raise MyStopIteration
else:
# return the next value
self.i -= 1
return self.i
for i in myiter(5):
print(i)
for i in myiter(12):
print(i)
try:
for i in myiter(22):
print(i)
except TypeError:
print('raised TypeError')
try:
for i in myiter(5):
print(i)
raise StopIteration
except StopIteration:
print('raised StopIteration')
for i in myiter(32):
print(i)
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