问题描述
我是Python的新手,试图将一个旧的python文件构建到Python 3中.我遇到了几个解决的错误.但是在这一点上,我正在克服错误.我不知道该如何解决.代码部分如下所示.
I am new at Python, trying to build an old python file into Python 3. I got several build errors which I solved. But at this point I am getting above error. I have no idea how to fix this. The code section looks like below.
return itertools.ifilter(lambda i: i.state == "IS", self.storage)
推荐答案
itertools.ifilter()
在Python 3中被删除,因为内置的 filter()
函数现在提供了相同的功能.
itertools.ifilter()
was removed in Python 3 because the built-in filter()
function provides the same functionality now.
如果您需要编写可在Python 2和Python 3中运行的代码,请使用 future_builtins
模块(仅在Python 2中,因此请使用try...except ImportError:
防护):
If you need to write code that can run in both Python 2 and Python 3, use imports from the future_builtins
module (only in Python 2, so use a try...except ImportError:
guard):
try:
# Python 2
from future_builtins import filter
except ImportError:
# Python 3
pass
return filter(lambda i: i.state == "IS", self.storage)
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