折腾：
【已解决】用Python把印象笔记中标题和链接合并一起
期间，对于代码：
# <div><a href="https://npm.taobao.org/mirrors/">https://npm.taobao.org/mirrors/</a></div> # <div><a href="https://npm.taobao.org/mirrors/python/">https://npm.taobao.org/mirrors/python/</a></div> # if hrefValue != aStr: hrefP = "(https?://)?%s/?" % aStr isSameUrl = re.match(hrefP, hrefValue, re.I)
结果报错：
发生异常: error multiple repeat at position 61 File "/Users/xxx/dev/crifan/EvernoteToWordpress/EvernoteToWordpress.py", line 200, in mergeNoteTitleAndUrl
对于：
hrefP= '(https?://)?Is there a way to get a call graph for certain c++ function in Visual Studio? - Stack Overflow/?' hrefValue= 'https://stackoverflow.com/questions/16190058/is-there-a-way-to-get-a-call-graph-for-certain-c-function-in-visual-studio'
结果无法正常匹配，而报错：
multiple repeat at position 61
python re multiple repeat at position
所以需要去对于
'(https?://)?Is there a way to get a call graph for certain c++ function in Visual Studio? - Stack Overflow/?'
其中特殊的字符串，需要转义？
c++
中的
+ +
Studio?
中的
?
估计是，所以去加上：
validAStr = aStr.replace("+", "\+")
validAStr = validAStr.replace("?", "\?")
validAStr = validAStr.replace("*", "\*")
validAStr = validAStr.replace(".", "\.")再优化为：
SpecialCharList = [ ".", "+", "*", "?", ] for eachSpecialChar in SpecialCharList: escapedChar = "\%s" % eachSpecialChar aStr = aStr.replace(eachSpecialChar, escapedChar)
结果：
从：
'Is there a way to get a call graph for certain c++ function in Visual Studio? - Stack Overflow'
被替换成了：
'Is there a way to get a call graph for certain c\\+\\+ function in Visual Studio\\? - Stack Overflow'
再去匹配，看看是否会报错
就不会报错了。
【总结】
此处由于代码
hrefP = "(https?://)?%s/?" % aStr isSameUrl = re.match(hrefP, hrefValue, re.I)
要去匹配的值aStr
'Is there a way to get a call graph for certain c++ function in Visual Studio? - Stack Overflow'
中包含特殊的正则字符，且是连续的 ++
导致逻辑上不成立：++ 在规则中是不合法的
所以报错
发生异常: error multiple repeat at position 61
解决办法：
确保正则的pattern中，没有无效的规则。
此处即，把特殊字符，都替换，加上反斜杠\去转义：
SpecialCharList = [ ".", "+", "*", "?", ] for eachSpecialChar in SpecialCharList: escapedChar = "\%s" % eachSpecialChar # '\\.' aStr = aStr.replace(eachSpecialChar, escapedChar) # 'Is there a way to get a call graph for certain c++ function in Visual Studio? - Stack Overflow' # -> # 'Is there a way to get a call graph for certain c\\+\\+ function in Visual Studio\\? - Stack Overflow' isSameUrl = re.match(hrefP, hrefValue, re.I)
即可规避此问题。
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