corrected max_page into max_pages

Author: sfolje0

Python/26_python.py

@@ -4,7 +4,7 @@
 
 def trade_spider(max_pages):
   page = 1
-  while page <= max_page:
+  while page <= max_pages:
     url = 'https://buckysroom.org/trade/search.php?page=' + str(page)
     source_code = requests.get(url)
     plain_text = source_code.text
@@ -16,4 +16,4 @@ def trade_spider(max_pages):
         print(title)
     page += 1
 
-trade_spider(1)
+trade_spider(1)