The tornado framework of Python implements the paging function

1. As a result, the HTML page and the request processing of the website are placed in different places.

start.py Code

import tornado.ioloop
import tornado.web
from controllers import home
Settings = {
'static path': 'statics', static file configuration, special handling required
"Static ﹣ URL ﹣ prefix ':' / SSS / ', the name of the beginning of the tag file"
}
#Route mapping, corresponding to different classes according to different URLs
application = tornado.web.Application([
(r"/index/(?P<page>\d*)", home.IndexHandler),
], * * settings) ා based on regular routing,? P < Page > indicates a name for the regular matching content
if __name__==‘__main__‘:
application.listen(8888)
tornado.ioloop.IOLoop.instance().start()

Home.py inside the Code

import tornado.web
List_Info=[
{‘username‘:‘jay‘,‘email‘:‘[email protected]‘}
]
class IndexHandler(tornado.web.RequestHandler):
def get(self,page):
#Five pieces of data per page
#Page is the current page
#Page 1: 0:5 list info [0:5]
#Page 2: 5:10
#start: (page-1)*5
#end:   (page)*5
try:page=int(page)
except:page=1
Print (page)
If page <1:
Page =1
start = (page - 1)*5
end = page * 5
current_ist = List_Info[start:end]
Self. Render ('e: \ \ exercise 2 \ \ tornado \ \ Day2 \ \ views \ \ home \ \ index. HTML ', list = current_ist, page = page)
#E: \ \ exercise 2 \ \ tornado \ \ Day2 \ \ views \ \ home \ \ index.html
def post(self,page):
user = self.get_argument(‘username‘)
email = self.get_argument(‘email‘)
temp = {‘username‘:user,‘email‘:email}
List_Info.append(temp)
self.redirect(‘/index/‘+page)

The index.html code inside the home file

<! DOCTYPE html>

	



	Run results


	



	Finally, we modify the code inside the home to enable the selection of the page function


	



	5] page 2: 5:10# = 1 List page = [] print (all page) if p U p age): if P + 1 = = page: temp = '< a class =' Act ive ' href= '/index/%s ' >%s&amp;  Lt;/a> '% (p + 1, p + 1) else:temp = ' <a href= '/index/%s ' >%s</a> '% (p + 1, p + 1) list_page.append (temp) Else:for p in range (PAGE-5,PAGE+4): if                P+1 = = Page:temp = ' <a class= ' active ' href= '/index/%s ' >%s</a> '% (p+1,p+1) Else:temp = ' <a href= '/index/%s ' >%s</a> '% (p + 1, p + 1) list_pa ge.append ( Temp) Str_page = '. Join (list_page) # str_page = List_page, without writing a join will display a comma on the page self.render (' e:\\ exercise 2\\tor Nado_day2\\views\\home\\index.html ', list= current_ist,page=page,str_page=str_page) #E: \ \ Practice 2\\tornado_day2\\views \\home\\index.html def post (self, page): User = Self.get_a rgument (' username ') email = self.get_argument (' email ') temp = {' username ': u Ser, ' email ': email} list_info.append (temp) self.redirect ('/index/' +page) print (list_info)


	Make less changes to index.html files


	



	Finally, the code inside the home is encapsulated,


	



	One page per five data, just how many pag es self.all_page=all_page if c > 0: # there The remainder is one more page All_page + = 1 Self.all_page = all_page# Gets the maximum page try:current_page=int (current_pag e) except:current_page=1 if Current_page <1:current_page =1 self.current_p        Age = Current_page @property def strat (self): return (self.current_page-1) @property def end ( self): Return self.current_page * 5 def get_page (self,base_url): self.all_page, C = Divmod (Len (list_info), 5) # One page per five data, judging how many pages if C > 0: # More than one page Self.all_page + = 1 List_page = [] If SELF.CURRENT_PA GE < 5:FOR p in range (9): if p + 1 = = Self.current_page:temp = ' <a class= "active" href= "%s%s ">%s </a>"% (base_url,p + 1, p + 1) else:temp = ' <a href= "%s%s" >%s</a > '% (base_url,p + 1, p + 1) list_page.append (temp) elif self.current_page > Self.all_page-5 : # Determine whether the page is in the top or last five page for P in range (self.all_page-9, self.all_page): if p = = Self.current_page                    : temp = ' <a class= ' active  ' href= '%s '%s ' >%s</a> '% (Base_url, p, p) Else:        temp = ' <a href= '%s%s ' >%s</a> '% (Base_url, p, p) list_page.append (temp) Else:for p in range (self.current_page-5, Self.current_page + 4): if p = = self.current_p Age:temp = ' <a class= ' active ' href= '%s%s ' >%s</a> '% (Base_url, p, p) Else : TEMp = ' <a href= '%s%s ' >%s</a> '% ( = Li Page obj. Current page says to pass the processed pages into t he Def post (self, page): User = Self.get_argument (' username ') email = self.get_argument (' email ') temp = {' username ': User, ' email ': email} list_info.append (temp) Self.redir ECT ('/index/' +page) print (list_info)


	Run


	



	The tornado framework of Python implements the paging function