add last fm similar artists to db table

+ add db methods for the above
+ try and discard last fm store

app/requests/artists.py

@@ -1,24 +1,33 @@
 """
 Requests related to artists
 """
+from pprint import pprint
 import requests
 
 from app import settings
 from app.utils.hashing import create_hash
+from requests import ConnectionError
+import urllib.parse
 
 
 def fetch_similar_artists(name: str):
     """
     Fetches similar artists from Last.fm
     """
-    url = f"https://ws.audioscrobbler.com/2.0/?method=artist.getsimilar&artist={name}&api_key=" \
-          f"{settings.Keys.LASTFM_API}&format=json&limit=250"
+    url = f"https://ws.audioscrobbler.com/2.0/?method=artist.getsimilar&artist={urllib.parse.quote_plus(name, safe='')}&api_key={settings.Keys.LASTFM_API}&format=json&limit=250"
 
-    response = requests.get(url, timeout=10)
-    response.raise_for_status()
+    try:
+        response = requests.get(url, timeout=10)
+        response.raise_for_status()
+    except ConnectionError:
+        return []
 
     data = response.json()
-    artists = data["similarartists"]["artist"]
+
+    try:
+        artists = data["similarartists"]["artist"]
+    except KeyError:
+        return []
 
     for artist in artists:
         yield create_hash(artist["name"])