Make propability-based command suggestions on unknown command

modules/unknown_command.py

@@ -0,0 +1,22 @@
+#--depends-on commands
+
+import difflib
+from src import ModuleManager, utils
+
+class Module(ModuleManager.BaseModule):
+    def _all_command_hooks(self):
+        return self.events.on("received.command").get_children()
+
+    @utils.hook("unknown.command")
+    def unknown_command(self, event):
+        all_commands = self._all_command_hooks()
+        match = difflib.get_close_matches(event["command"], all_commands,
+            cutoff=0.7)
+        if match:
+            nickname = ""
+            if event["is_channel"]:
+                nickname = "%s: " % event["user"].nickname
+
+            event["target"].send_message(
+                "%sUnknown command. Did you mean %s%s?" % (
+                nickname, event["command_prefix"], match[0]))