Added error checking for empty parameters

modules/calc.py

@@ -69,6 +69,8 @@ def calc(phenny, input):
 
 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))

modules/dict.py

@@ -22,6 +22,8 @@
 )
 
 def dict(phenny, input): 
+   if not input.group(2):
+      return phenny.reply("Nothing to define.")
    word = input.group(2)
    word = urllib.quote(word.encode('utf-8'))
 

modules/search.py

@@ -69,6 +69,8 @@ def gc(phenny, input):
 )
 
 def gcs(phenny, input): 
+   if not input.group(2):
+      return phenny.reply("Nothing to compare.")
    queries = r_query.findall(input.group(2))
    if len(queries) > 6: 
       return phenny.reply('Sorry, can only compare up to six things.')

modules/validate.py

@@ -11,6 +11,8 @@
 
 def val(phenny, input): 
    """Check a webpage using the W3C Markup Validator."""
+   if not input.group(2):
+      return phenny.reply("Nothing to validate.")
    uri = input.group(2)
    if not uri.startswith('http://'): 
       uri = 'http://' + uri

modules/wiktionary.py

@@ -72,6 +72,8 @@ def format(word, definitions, number=2):
    return result.strip(' .,')
 
 def w(phenny, input): 
+   if not input.group(2):
+      return phenny.reply("Nothing to define.")
    word = input.group(2)
    etymology, definitions = wiktionary(word)
    if not definitions: