diff --git a/lib/parser.py b/lib/parser.py
index 4d8c736..7fd6c0a 100644
--- a/lib/parser.py
+++ b/lib/parser.py
@@ -1,7 +1,7 @@
 #!/usr/bin/env python2
 # -*- coding: UTF-8 -*-
 # File: parser.py
-# Date: Mon Dec 22 09:45:35 2014 +0800
+# Date: Mon Dec 22 16:50:31 2014 +0800
 # Author: Yuxin Wu <ppwwyyxxc@gmail.com>
 
 import sqlite3
@@ -58,9 +58,8 @@ SELECT {} FROM message
             msg = WeChatMsg(row)
             if not WeChatMsg.filter_type(msg.type):
                 self.msgs_by_talker[msg.talker].append(msg)
-        self.msgs_by_talker = dict([
-            (self.contacts[k], sorted(v, key=lambda x: x.createTime))
-                           for k, v in self.msgs_by_talker.iteritems()])
+        self.msgs_by_talker = {self.contacts[k]: sorted(v, key=lambda x: x.createTime)
+                           for k, v in self.msgs_by_talker.iteritems()}
         for k, v in self.msgs_by_talker.iteritems():
             for msg in v:
                 msg.talker_name = ensure_unicode(k)
@@ -75,8 +74,8 @@ SELECT {} FROM message
 
     def _parse_imginfo(self):
         imginfo_q = self.cc.execute("""SELECT msgSvrId, bigImgPath FROM ImgInfo2""")
-        self.imginfo = dict([(k, v) for (k, v) in imginfo_q
-                             if not v.startswith('SERVERID://')])
+        self.imginfo = {k: v for (k, v) in imginfo_q
+                             if not v.startswith('SERVERID://')}
         logger.info("Found {} big images records.".format(len(self.imginfo)))
 
     def _find_msg_by_type(self, msgs=None):
diff --git a/lib/render.py b/lib/render.py
index 4dc022b..7305117 100644
--- a/lib/render.py
+++ b/lib/render.py
@@ -1,7 +1,7 @@
 #!/usr/bin/env python2
 # -*- coding: UTF-8 -*-
 # File: render.py
-# Date: Mon Dec 22 09:49:12 2014 +0800
+# Date: Mon Dec 22 16:52:48 2014 +0800
 # Author: Yuxin Wu <ppwwyyxxc@gmail.com>
 
 import os
@@ -27,9 +27,8 @@ TEMPLATES_FILES = {TYPE_MSG: "TP_MSG",
                    TYPE_SPEAK: "TP_SPEAK",
                    TYPE_EMOJI: "TP_EMOJI",
                    TYPE_LINK: "TP_MSG"}
-TEMPLATES = dict([(k, ensure_unicode(open(os.path.join(
-    LIB_PATH, 'static/{}.html'.format(v))).read()))
-    for k, v in TEMPLATES_FILES.iteritems()])
+TEMPLATES = {k: ensure_unicode(open(os.path.join(LIB_PATH, 'static/{}.html'.format(v))).read())
+    for k, v in TEMPLATES_FILES.iteritems()}
 
 class HTMLRender(object):
     def __init__(self, parser, res=None):
@@ -108,7 +107,7 @@ class HTMLRender(object):
                 else:
                     group = None
                 emoji_img, format = self.res.get_emoji(imgpath, group)
-            assert emoji_img
+            #assert emoji_img
             return template.format(sender_label=sender,
                                   emoji_format=format,
                                   emoji_img=emoji_img)
diff --git a/lib/res.py b/lib/res.py
index f289bbd..1547bb3 100644
--- a/lib/res.py
+++ b/lib/res.py
@@ -1,7 +1,7 @@
 #!/usr/bin/env python2
 # -*- coding: UTF-8 -*-
 # File: res.py
-# Date: Mon Dec 22 09:48:16 2014 +0800
+# Date: Mon Dec 22 16:52:56 2014 +0800
 # Author: Yuxin Wu <ppwwyyxxc@gmail.com>
 
 import glob
@@ -158,7 +158,9 @@ class Resource(object):
             # annimation
             candidates = [k for k in candidates if not re.match('.*_[0-9]+$', k)]
             # only one file is the gif in need, others are frames and cover
-            assert len(candidates) == 1
+            if len(candidates) == 0:
+                # TODO stitch frames to gif
+                return None, None
         if not candidates:
             return None, None
         fname = candidates[0]
@@ -166,6 +168,6 @@ class Resource(object):
 
     def get_internal_emoji(self, fname):
         f = os.path.join(INTERNAL_EMOJI_DIR, fname)
-        return Resource.get_file_b64(fname), imghdr.what(fname)
+        return Resource.get_file_b64(f), imghdr.what(f)
 
 
diff --git a/lib/smiley.py b/lib/smiley.py
index ae84f98..5881b5d 100755
--- a/lib/smiley.py
+++ b/lib/smiley.py
@@ -1,7 +1,7 @@
 #!/usr/bin/env python2
 # -*- coding: UTF-8 -*-
 # File: smiley.py
-# Date: Sun Dec 21 23:41:14 2014 +0800
+# Date: Mon Dec 22 16:50:15 2014 +0800
 # Author: Yuxin Wu <ppwwyyxxc@gmail.com>
 
 import os
@@ -29,17 +29,16 @@ class SmileyProvider(object):
 
         # some extra smiley from javascript on wx.qq.com
         extra_smiley = json.load(open(TENCENT_EXTRASMILEY_FILE))
-        extra_smiley = dict([(u'[' + k + u']', v) for k, v in
-                            extra_smiley.iteritems()])
+        extra_smiley = {u'[' + k + u']': v for k, v in
+                            extra_smiley.iteritems()}
         self.tencent_smiley.update(extra_smiley)
 
         # 1f35c -> "\ue340"
         #self.unicode_smiley_code = gUnicodeCodeMap
 
         # u'\U0001f35c' -> "e340"
-        self.unicode_smiley = dict([(unichr(int(k, 16)), hex(ord(v))[2:])
-                                for k, v in
-                                  json.load(open(UNICODE_SMILEY_FILE)).iteritems()])
+        self.unicode_smiley = {unichr(int(k, 16)): hex(ord(v))[2:] for k, v in
+                                  json.load(open(UNICODE_SMILEY_FILE)).iteritems()}
         self.used_smiley_id = set()