本文介绍了无限范围()的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
Is there an unbounded version of range (or xrange for Python 2), or is it necessary to define it manually? For example
squares = (x*x for x in range(n))
can only give me a generator for the squares up to (n-1)**2, and I can't see any obvious way to call range(infinity) so that it just keeps on truckin'.
解决方案
You're describing the basic use of itertools.count:
import itertools
squares = (x*x for x in itertools.count())
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