[英]Printing a generator object in Python
我正在尝试按照以下代码访问由生成器创建的所有元素:
from itertools import combinations
Fatores = ['Ft', 'Fp', 'Floc']
def combinations(iterable, r):
# combinations('ABCD', 2) --> AB AC AD BC BD CD
# combinations(range(4), 3) --> 012 013 023 123
pool = tuple(iterable)
n = len(pool)
if r > n:
return
indices = range(r)
yield tuple(pool[i] for i in indices)
while True:
for i in reversed(range(r)):
if indices[i] != i + n - r:
break
else:
return
indices[i] += 1
for j in range(i+1, r):
indices[j] = indices[j-1] + 1
yield tuple(pool[i] for i in indices)
panel = combinations(Fatores,2)
for subset in panel:
print(subset)
但是,我收到以下错误消息:
TypeError: 'range' object 不支持项目分配
有没有人有一些提示来解决这个问题?
亲切的问候
你的代码有问题
1.
if r > n: return indices = range(r) yield tuple(pool[i] for i in indices)
indices assignment 应该高于 return 而 return 应该只返回变量
我不太确定这部分试图做什么,但我认为上面是否应该是 for 循环
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