Python语言总结

第 3 章 Python语言本身的理解和心得

在使用for循环时，要注意其所得的单个变量，是只读的，不能修改。

想要修改其值的话，只能借助其他变量实现。

示例代码如下：

for singleContent in soupContents: #singleContent is BeautifulSoup.Tag
    ......
    if(recursive):
        ......
        filteredSingleContent = singleContent; # here must use another tmp value to store changed value
        filteredSubContentList = removeSoupContentsTagAttr(filteredSingleContent.contents, ......);
        ......
        filteredSingleContent.contents = filteredSubContentList; # here if use singleContent.contents = filteredSubContentList will cause error !!!
        #logging.debug("[%d] after filter, sub contents=%s", currentLevel, filteredSingleContent);
        filtedContents.append(filteredSingleContent);
    else:
        ......