add ipy_workdir

IPython/Extensions/ipy_workdir.py

@@ -0,0 +1,31 b''
+#!/usr/bin/env python
+
+import IPython.ipapi
+ip = IPython.ipapi.get()
+
+import os
+
+workdir = None
+def workdir_f(line):
+    global workdir
+    dummy,cmd  = line.split(None,1)
+    if os.path.isdir(cmd):
+        workdir = cmd
+        print "Set workdir",workdir
+    elif workdir is None:
+        print "Please set workdir first by doing e.g. 'workdir q:/'"
+    else:
+        print "Execute command in",workdir
+        cwd = os.getcwd()
+        os.chdir(workdir)
+        try:
+            ip.runlines(cmd)
+        finally:
+            os.chdir(cwd)
+
+ip.defalias("workdir",workdir_f)
+        
+        
+        
+    
+