Added error checking for empty parameters

modules/calc.py

@@ -69,6 +69,8 @@ calc.example = '.calc 5 + 3'
 
 def c(phenny, input): 
    """Google calculator."""
+   if not input.group(2):
+      return phenny.reply("Nothing to calculate.")
    q = input.group(2).encode('utf-8')
    q = q.replace('\xcf\x95', 'phi') # utf-8 U+03D5
    q = q.replace('\xcf\x80', 'pi') # utf-8 U+03C0
@@ -99,6 +101,8 @@ def py(phenny, input):
 py.commands = ['py']
 
 def wa(phenny, input): 
+   if not input.group(2):
+      return phenny.reply("No search term.")
    query = input.group(2).encode('utf-8')
    uri = 'http://tumbolia.appspot.com/wa/'
    answer = web.get(uri + web.urllib.quote(query))