与正则表达式有关：sre_yield
jopen
10年前
sre_yield 是用于生成正则表达式匹配结果的 Python 模块，并尽可能的匹配到所有有效值。它采用了解析正则表达式的方式，所以你可以得到一个更加精确的结果，而不仅仅只是分散的字符串。
sre_yield 通常都无法处理反向引用、lookarounds 正则表达式，除此之外，还有在这几种情况下也无法处理；
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The maximum value for repeats is system-dependant -- CPython'ssremodule there's a special value which is treated as infinite (either 2**16-1 or 2**32-1 depending on build). In sre_yield, this is taken as a literal, rather than infinite, thus (on a 2**16-1 platform):
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Theremodule docs say "Regular expression pattern strings may not contain null bytes" yet this appears to work fine.
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Order does not depend on greediness.
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The regex is treated as fullmatch.
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sre_yieldis confused by even the simplest of anchors:
代码示例：
>>> import random >>> v = sre_yield.AllStrings('[abc]{1,4}') >>> len(v) 120 # Now random.choice(v) has a 3/120 chance of choosing a single letter. >>> random.seed(1) >>> sum([1 if len(random.choice(v)) == 1 else 0 for _ in range(120)]) 3 # xeger(v) has ~25% chance of choosing a single letter, because the length and match are chosen independently. > from rstr import xeger > sum([1 if len(xeger('[abc]{1,4}')) == 1 else 0 for _ in range(120)]) 26