fixes in data import tool - restrict import upto 500 rows, commit only if import is successful, else rollback
diff --git a/selling/doctype/lead/lead.py b/selling/doctype/lead/lead.py
index d0a715d..d50a348 100644
--- a/selling/doctype/lead/lead.py
+++ b/selling/doctype/lead/lead.py
@@ -67,7 +67,6 @@
 			return ret
 	
 	def validate(self):
-		import string		
 		if self.doc.status == 'Lead Lost' and not self.doc.order_lost_reason:
 			msgprint("Please Enter Lost Reason under More Info section")
 			raise Exception	
@@ -80,7 +79,6 @@
 			if not validate_email_add(self.doc.email_id):
 				msgprint('Please enter valid email id.')
 				raise Exception
-		
 	
 	def on_update(self):
 		if self.doc.contact_date: