程序员，没事多练练，
并发，并行编程，算法，设计模式，
这三个方面的知识点，没事就要多练练，基本功呀。
class MyIterator:
def __init__(self, element):
self.element = element
def __iter__(self):
return self
def __next__(self):
if self.element:
return self.element.pop(0)
else:
raise StopIteration
itrtr = MyIterator([0, 1, 2, 3, 4])
print(next(itrtr))
print(next(itrtr))
print(next(itrtr))
print(next(itrtr))
print(next(itrtr))
print("===============")
def my_generator(n):
while n:
n -= 1
yield n
for i in my_generator(3):
print(i)
print("===============")
print(my_generator(5))
g = my_generator(4)
print(next(g))
print(next(g))
print(next(g))
print(next(g))
print("===============")
def complain_about(substring):
print('Please talk to me!')
try:
while True:
text = (yield )
if substring in text:
print('Oh no: I found a %s again!' % (substring))
except GeneratorExit:
print('OK, ok: I am quitting.')
c = complain_about('Ruby')
next(c)
c.send('Test data')
c.send('Some more random text')
c.send('Test data with Ruby somewhere in it')
c.send('Stop complaining about Ruby or else!')
c.close()
print("===============")
def coroutine(fn):
def wrapper(*args, **kwargs):
c = fn(*args, **kwargs)
next(c)
return c
return wrapper
@coroutine
def complain_about2(substring):
print('Please talk to me!')
while True:
text = (yield )
if substring in text:
print('Oh no: I found a %s again!' % (substring))
c = complain_about2('JavaScript')
c.send("hello")
c.send("Test data with JavaScript")
c.close()
输出：
=============== =============== <generator object my_generator at 0x0000000002631BA0> =============== Please talk to me! Oh no: I found a Ruby again! Oh no: I found a Ruby again! OK, ok: I am quitting. =============== Please talk to me! Oh no: I found a JavaScript again! Process finished with exit code