考虑我是否有一个带有元组参数(x,y)的函数,其中x在范围(X)中,y在范围(Y)中,正常的方法是:
for x in range(X):
for y in range(Y):
function(x,y)
有办法吗
for xy in something_like_range(X,Y):
function(xy)
这样xy是一个元组(x,y)?
答案 0 :(得分:16)
>>> from itertools import product
>>>
>>> for x,y in product(range(3), range(4)):
... print (x,y)
...
(0, 0)
(0, 1)
(0, 2)
(0, 3)
(1, 0)
(1, 1)
(1, 2)
(1, 3)
... and so on
您的代码如下:
for x,y in product(range(X), range(Y)):
function(x,y)
答案 1 :(得分:5)
您可以使用itertools.product()
:
from itertools import product
for xy in product(range(X), range(Y)):
function(xy)
答案 2 :(得分:4)
Pythonic他们是 - > (根据您的要求修改)
>>> [ (x,y) for x in range(2) for y in range(2)]
[(0, 0), (0, 1), (1, 0), (1, 1)]
生成器版本:
gen = ( (x,y) for x in range(2) for y in range(2) )
>>> for x,y in gen:
... print x,y
...
0 0
0 1
1 0
1 1
答案 3 :(得分:2)
尝试使用itertools产品:http://docs.python.org/library/itertools.html#itertools.product
from itertools import product
for x, y in product(range(X), range(Y)):
function(x, y)
答案 4 :(得分:0)
from itertools import product
def something_like_range(*sizes):
return product(*[range(size) for size in sizes])
用于接近您想要的用法:
for x,y in something_like_range(X,Y):
your_function(x,y)
=)