HTML file

 & lt; Select id="nr" name="nr" & gt; 
 
 Each page shows article 20 & lt;/option> 
 
 

 s=Select (driver. Find_element_by_id (" nr ")) 
S.s elect_by_visible_text (data. Xuanze) 
An error 
Raise NoSuchElementException (" Could not locate the element with the visible text: % s "% text) 

What reason is this?

Data. The xuanze is variable from the data files under xuanze, the text content of reading the database field, he is "each page shows article 20"