I now have a project that needs webmagic to crawl the title, but the title of this site has two styles xpath xpath( " div[@class= "title "] text() "), 3css( "div.title ") this is not what I need I don t know if there is a way to set up a xpath or us...
def trim (s): while s[:1]== : s=s[1:] while s[-1:]== : -sharpwhile s[-1]== s=s[:-1] -sharp IndexError: string index out of range return s ...
in the API reference document of Huawei Cloud blockchain Service, Huawei Cloud has the following description for the message header requesting its REST API service: x-bcs-signature-sign: to ensure that only authorized callers are allowed to make legit...
how do users create and insert new data when requesting data? I think the data sent from the background will be added to the initial data data, and then re-setData ({}). But if the amount of data is large, such as the initial display of 20 pieces of data...
node error memory overflow npm failed to start the project first, the project reports an error: FATAL ERROR: CALL_AND_RETRY_LAST Allocation failed-JavaScript heap out of memory checked the memory leak when it was found and modified dev dev: "n...
IP forwarding is enabled for server deployment pptp,iptables. after the completion of the dial-up connection of other computers, the first two are normal, but it is found that the computers connected behind cannot access the external network. I am a r...