optimize parsing

backend/chainetv/api.py

@@ -1,11 +1,13 @@
 from flask import Blueprint, jsonify, request,make_response,redirect,url_for,render_template,current_app
 from .Jsonfile import JSONfile
-from . import emission
+from .emission import Emmission
 import jwt
 from functools import wraps  
 from datetime import datetime, timedelta
 from .user import User
+
 data= JSONfile("chaine.json")
+emmission= Emmission()
 
 def token_required(f):  
     @wraps(f)
@@ -68,7 +70,8 @@ def get_emmission(num):
     if (chaine == "numero de chaine inconnue"):
         return make_response("",204)
     else:    
-        return jsonify(emission.parse_emmission(chaine))
+
+        return jsonify(emmission.parse_emmission(chaine))
 
 #@api.route('/register/', methods=('POST',))
 #def register():  

backend/chainetv/emission.py

@@ -1,28 +1,37 @@
 from bs4 import BeautifulSoup
 import urllib.request
 import re
+from datetime import datetime, timedelta
 
 #debug
 #import pprint
 
-def parse_emmission(strsearch):
+class Emmission(object):
+
+    def __init__(self):
+        self._LoadreferencePage()
+
+    def _LoadreferencePage(self):
         URL="https://www.programme-tv.net/programme/canal-5/"
         try:
             response = urllib.request.urlopen(URL)
         except urllib.error.URLError:
-        return False
+            return None
+        print("load")
+        self.html = BeautifulSoup(response.read(),"html.parser")
+        self.timestamp=datetime.utcnow() 
 
-    html = response.read()
-    parse=BeautifulSoup(html,"html.parser")
+    def parse_emmission(self,strsearch):
+        if (self.timestamp > self.timestamp+timedelta(minutes=5)):
+            self._LoadreferencePage()
         strsearch=strsearch.replace('É','E')
-    linkchaine=parse.find(text=re.compile(re.escape(strsearch)))
+        linkchaine=self.html.find(text=re.compile(re.escape(strsearch)))
         if linkchaine == None:
             return "can't find channel"
         link = linkchaine.parent.parent.find_next_sibling().find("a")
         href = link['href']
         response = urllib.request.urlopen(href)
-    html = response.read()
-    parse=BeautifulSoup(html,"html.parser")
+        parse=BeautifulSoup(response.read(),"html.parser")
         divcasting=parse.select_one(".descriptif")
         if (divcasting):
             casting=divcasting.find_all(href=re.compile("biographie"))