completers for %clear magic, add shadow history deletion

IPython/Extensions/clearcmd.py

@@ -1,47 +1,56 b''
 # -*- coding: utf-8 -*-
 """ IPython extension: add %clear magic """
 
 import IPython.ipapi
 import gc
 ip = IPython.ipapi.get()
 
 
 def clear_f(self,arg):
     """ Clear various data (e.g. stored history data)
     
     %clear out - clear output history
     %clear in  - clear input history
     """
     
     api = self.getapi()
     for target in arg.split():
         if target == 'out':
             print "Flushing output cache (%d entries)" % len(api.user_ns['_oh'])
             self.outputcache.flush()
         elif target == 'in':
             print "Flushing input history"
             from IPython import iplib
             del self.input_hist[:]
             del self.input_hist_raw[:]
             for n in range(1,self.outputcache.prompt_count + 1):
                 key = '_i'+`n`
                 try:
                     del self.user_ns[key]
                 except: pass
         elif target == 'array':
             try:
                 pylab=ip.IP.pylab
                 for x in self.user_ns.keys():
                     if isinstance(self.user_ns[x],pylab.arraytype):
                         del self.user_ns[x]
             except AttributeError:
                 print "Clear array only available in -pylab mode"
             gc.collect()                
-        elif target == 'shadow':
+
+        elif target == 'shadow_compress':
+            print "Compressing shadow history"
             api.db.hcompress('shadowhist')
             
+        elif target == 'shadow_nuke':
+            print "Erased all keys from shadow history "
+            for k in ip.db.keys('shadowhist/*'):
+                del ip.db[k]
+            
 ip.expose_magic("clear",clear_f)
+import ipy_completers
+ipy_completers.quick_completer('clear','in out shadow_nuke shadow_compress')