python - 如何使用 RecursionError(Python, PyQt4) 改善我的情况？

Question

所以，我有一个函数，它的目的是为被逗号包围的单词着色。

    def __init__(...something):
        ...something
        self.user_input = QtGui.QTextEdit(self)
        self.user_input.textChanged.connect(self.check_text)
        ...something

    def check_text(self):
        text = self.user_input.toPlainText().strip()
        comma = ","
        if comma in text: 
            elements_quantity = text.count(comma)
            sites = text.split(comma)
            sites_quantity = len(sites)
            done_sites = [] 
            if sites_quantity > elements_quantity:
                done_sites = sites[:elements_quantity]
            else:
                done_sites = sites
        else:
            done_sites = [""]

        for site in done_sites:
            new_site = "<strong>{site}</strong>"
            text = text.replace(site, new_site.format(site=site))
        self.user_input.setHtml(text)
        self.user_input.moveCursor(QtGui.QTextCursor.End)

而且，当我开始编写时，每次编写符号时，我都会遇到 RecursionError: maximum recursion depth exceeded while calling a Python object。我应该如何改进它？

Answer 1

当您尝试更改文本时，只需阻止信号

self.blockSignal(True)
self.user_input.setHtml(text)
self.user_input.moveCursor(QtGui.QTextCursor.End)
self.blockSignal(False)