這裡是一段防爬蟲文字，請讀者忽略。
本文原創首發於csdn，作者idys
部落格首頁：
生成器函式
迭代器一定是可迭代物件，可迭代物件不一定是迭代器
def
inc():
for i in
range(5
):yield i
print
(type
(inc)
)print
(type
(inc())
)x = inc(
)print
(type
(x))
print
(next
(x))
for m in x:
print
(m, end=
"* "
)for m in x:
print
(m,"**"
)
<
class
'function'
>
<
class
'generator'
>
<
class
'generator'
>01
*2*3
*4*
my_func =
(i for i in
range(10
))print
(type
(my_func)
)print
(next
(my_func)
)print
(next
(my_func)
)
<
class
'generator'
>
01
def
gen():
print
("1"
)yield
1print
("2"
)yield
2print
("3"
)return
3print
(next
(gen())
)print
(next
(gen())
)g = gen(
)print
("***********************************"
)print
(next
(g))
print
(next
(g))
# print(next(g)) # 會報stopiteration 錯誤
print
(next
(g,"end"
))
111
1******
****
****
****
****
****
****
*****1
1223
end
deffn(
):i =
0while
true
: i = i +
1yield i
definc
(c):
return
next
(c)def
inc_two()
: c = fn(
)return
next
(c)c = fn(
)print
(inc(c)
)print
(inc(c)
)print
(inc_two())
# 顯示1
print
(inc_two())
# 顯示1
print
(inc_two())
# 顯示1
121
11
def
fib():
x =0 y =
1while
true
:yield y
y, x = x+y, y
foo = fib(
)for _ in
range(10
):print
(next
(foo)
, end=
" ")
112
35813
2134
55
協程是一種非搶占式排程
def
inc():
for x in
range
(1000):
yield x
definc_two()
:yield
from
range
(1000
)foo = inc(
)foo1 = inc_two(
)print
(next
(foo)
)print
(next
(foo)
)print
(next
(foo)
)print
("***************************"
)print
(next
(foo1)
)print
(next
(foo1)
)print
(next
(foo1)
)
012
****
****
****
****
****
*******
012
演示**
def
counter
(n):
for x in
range
(n):
yield x
definc
(n):
yield
from counter(n)
foo1 = inc(10)
print
(next
(foo1)
)print
(next
(foo1)
)print
(next
(foo1)
)print
(next
(foo1)
)
012
3
python中生成器yield
def yield demo for x in range 3 yield x print 生成器後一行 a yield demo print a 這裡的a是乙個生成器物件 可以用for迴圈來遍歷生成器物件裡的元素 for i in a print i 那麼yield的工作過程是怎麼樣的呢？可以通過...
Python生成器 yield的使用
通過列表生成式，我們可以直接建立乙個列表。但是，受到記憶體限制，列表容量肯定是有限的。而且，建立乙個包含100萬個元素的列表，不僅占用很大的儲存空間，如果我們僅僅需要訪問前面幾個元素，那後面絕大多數元素占用的空間都白白浪費了。所以，如果列表元素可以按照某種演算法推算出來，那我們是否可以在迴圈的過程中...
Python探險 生成器yield剖析
日期 20170926 本次執行環境python3 我們先來看一下 usr bin python3 defmygenerator yield 1yield 2yield 3return done print mygenerator print num mygenerator print num pr...