Make parser reject single column tables

diff --git a/lightcards/parse.py b/lightcards/parse.py
index ea3468d66bfdca5f898431ce3a8d6743712b405f..6fc2a759cf2ac152f636b9a376efa9ddf2d9db29 100644 (file)
--- a/lightcards/parse.py
+++ b/lightcards/parse.py
@@ -32,7 +32,7 @@ def parse_html(html):
         sys.exit("lightcards: No table found")
 
     ths = soup.find_all("th")
-    if not len(ths) in [1, 2]:
+    if len(ths) != 2:
         sys.exit("lightcards: Headings malformed")
 
     # Return a tuple of nested lists