weixin_60980116: 请问人工加了之后又报错是因为什么呀? LookupError: ********************************************************************** Resource punkt not found. Please use the NLTK Downloader to obtain the resource: >>> import nltk >>> nltk.download('punkt') For more information see: https://www.nltk.org/data.html

weixin_45064330: KeyError: 'header'

boluo_junjun: 你好，我按照您的方法最终至提取除了特殊符号，这是怎么回事呀

隐函数求导方程组: [code=cpp] #include //#include #include #include #include #include #include using namespace std; int main() { char a; int n,c=0; while(cin>>a) { if(a=='@') break; if(c!=0) coutn; for(int i=1;i