Add check for wrong urls

anime_downloader/anime.py

@@ -33,6 +33,10 @@ class Anime:
         r = requests.get(self.url)
         soup = BeautifulSoup(r.text, 'html.parser')
         episodes = soup.find_all('ul', ['episodes'])
+        if episodes == []:
+            err = 'No episodes found in url "{}"'.format(self.url)
+            args = [self.url]
+            raise NotFoundError(err, *args)
         episodes = episodes[:int(len(episodes)/3)]
 
         for x in episodes:

anime_downloader/cli.py

@@ -1,5 +1,5 @@
 import click
-from .anime import Anime
+from .anime import Anime, NotFoundError
 
 echo = click.echo
 
@@ -17,7 +17,11 @@ def cli(anime_url, range, playlist, url):
 
         Download your favourite anime.
     """
-    anime = Anime(anime_url)
+    try:
+        anime = Anime(anime_url)
+    except NotFoundError as e:
+        echo(e.args[0])
+        return
 
     if range is None:
         range = '1:'+str(len(anime)+1)