Some fields of the crawler that should be output in Chinese are output as none

reason ： Used when extracting content tag.string(), View source code , It is found that the label content is ：

<td data-v-428f2a6c>
                         comprehensive 
                        <!----></td>

More <!---->

Reading ： When tag Contains multiple child nodes ,tag You can't be sure .string Method should call the contents of which child node , .string The output of is None

solve ： take tag.string() Switch to tag.text()

Optimize ：tag.text().strip() Remove the leading and trailing spaces and line breaks