ShadowEditor/test/python/iterators.py
2019-09-02 20:10:47 +08:00

45 lines
694 B
Python

for i in [1, 2, 3]:
print(i)
for i in (4, 5, 6):
print(i)
for i in {'a': 1, 'b': '2'}:
print(i)
a = iter('111')
print(next(a))
print(next(a))
print(next(a))
class Reverse:
def __init__(self, data):
self.data = data
self.index = len(data)
def __iter__(self):
return self
def __next__(self):
if self.index == 0:
raise StopIteration
self.index = self.index - 1
return self.data[self.index]
rev = Reverse('spam')
print(iter(rev))
for char in rev:
print(char)
def reverse(data):
for index in range(len(data) - 1, -1, -1):
yield data[index]
for char in reverse('golf'):
print(char)