From 0350bed8fd29bf75a610182e6083a90977c21480 Mon Sep 17 00:00:00 2001
From: Alex Cepoi <alex.cepoi@gmail.com>
Date: Fri, 31 Aug 2012 16:43:04 +0200
Subject: [PATCH] parse command: fix crash in case of bad callback

---
 scrapy/commands/parse.py | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/scrapy/commands/parse.py b/scrapy/commands/parse.py
index 3e01c771d..a1b7849f1 100644
--- a/scrapy/commands/parse.py
+++ b/scrapy/commands/parse.py
@@ -152,9 +152,14 @@ class Command(ScrapyCommand):
                 else:
                     cb = 'parse'
 
-            cb = cb if callable(cb) else getattr(self.spider, cb, None)
-            if not cb:
-                log.msg('Cannot find callback %r in spider: %s' % (callback, self.spider.name))
+            if not callable(cb):
+                cb_method = getattr(self.spider, cb, None)
+                if callable(cb_method):
+                    cb = cb_method
+                else:
+                    log.msg('Cannot find callback %r in spider: %s' % \
+                            (cb, self.spider.name), level=log.ERROR)
+                    return
 
             # parse items and requests
             depth = response.meta['_depth']