我的任务是使用NCBI的E-Utilties检索过去10年中每年提交的关于Crispr/Cas9系统的论文数量。我如何一次搜索多个数据库?到目前为止我的代码如下:
handle = Entrez.esearch(db ="pubmedrecord["Count"]
print "Number of papers in 2016 is: ", r
我想传递一个条件,if(xmlName(fetch.pubmed) == PubmedBookArticle提取某些值,elseif (xmlName(fetch.pubmed) == PubmedArticle这看起来很简单,但是(xmlName(fetch.pubmed)抛出错误no applicable method for 'xmlName' applied to an object of class<- entrez_fetch(db = "pubmed", id =