42、多线程编程：实现与优化

多线程编程：实现与优化

1. 二级线程的实现

在多线程编程中，为了实现高效的页面索引，我们引入了二级线程。这里以Walker类为例，它继承自QThread，用于处理文件索引的工作。

class Walker(QThread): COMMON_WORDS_THRESHOLD = 250 MIN_WORD_LEN = 3 MAX_WORD_LEN = 25 INVALID_FIRST_OR_LAST = frozenset("0123456789_") STRIPHTML_RE = re.compile(r"<[^>]*?>", re.IGNORECASE|re.MULTILINE) ENTITY_RE = re.compile(r"&(\w+?);|&#(\d+?);") SPLIT_RE = re.compile(r"\W+", re.IGNORECASE|re.MULTILINE) def __init__(self, lock, parent=None): super(Walker, self).__init__(parent) self.lock = lock self.stopped = False self.mutex = QMutex() self.path = None self.completed = False def initialize(self,