Add API key messages to books and youtube

Author: dmptrluke

plugins/books.py

@@ -17,7 +17,7 @@ def load_key(bot):
 def books(text):
     """books <query> -- Searches Google Books for <query>."""
     if not dev_key:
-        return "No Google API key."
+        return "This command requires a Google API key."
 
     json = requests.get(book_search_api, params={"q": text, "key": dev_key}).json()
 

plugins/youtube.py

@@ -78,6 +78,9 @@ def youtube_url(match, bot):
 @hook.command("youtube", "you", "yt", "y")
 def youtube(text):
     """youtube <query> -- Returns the first YouTube search result for <query>."""
+    if not dev_key:
+        return "This command requires a Google API key."
+
     json = requests.get(search_api_url, params={"q": text, "key": dev_key}).json()
 
     if 'error' in json:
@@ -94,6 +97,9 @@ def youtube(text):
 @hook.command("youtime", "ytime")
 def youtime(text):
     """youtime <query> -- Gets the total run time of the first YouTube search result for <query>."""
+    if not dev_key:
+        return "This command requires a Google API key."
+
     json = requests.get(search_api_url, params={"q": text, "key": dev_key}).json()
 
     if 'error' in json: