diff --git a/nhentai/__init__.py b/nhentai/__init__.py
index a05cc6d..46ed22e 100644
--- a/nhentai/__init__.py
+++ b/nhentai/__init__.py
@@ -1,3 +1,3 @@
-__version__ = '0.4.9'
+__version__ = '0.4.10'
 __author__ = 'RicterZ'
 __email__ = 'ricterzheng@gmail.com'
diff --git a/nhentai/cmdline.py b/nhentai/cmdline.py
index 532beb4..b14ec4d 100644
--- a/nhentai/cmdline.py
+++ b/nhentai/cmdline.py
@@ -15,17 +15,6 @@ from nhentai import __version__
 from nhentai.utils import urlparse, generate_html, generate_main_html, DB
 from nhentai.logger import logger
 
-try:
-    if sys.version_info < (3, 0, 0):
-        import codecs
-        import locale
-        sys.stdout = codecs.getwriter(locale.getpreferredencoding())(sys.stdout)
-        sys.stderr = codecs.getwriter(locale.getpreferredencoding())(sys.stderr)
-
-except NameError:
-    # python3
-    pass
-
 
 def banner():
     logger.info(u'''nHentai ver %s: あなたも変態。 いいね?
diff --git a/nhentai/command.py b/nhentai/command.py
index 7341677..16adc22 100644
--- a/nhentai/command.py
+++ b/nhentai/command.py
@@ -1,8 +1,7 @@
 #!/usr/bin/env python2.7
 # coding: utf-8
 from __future__ import unicode_literals, print_function
-import json
-import os
+import sys
 import signal
 import platform
 import time
@@ -113,5 +112,10 @@ def main():
 
 signal.signal(signal.SIGINT, signal_handler)
 
+
 if __name__ == '__main__':
+    if sys.version_info < (3, 0, 0):
+        logger.error('nhentai now only support Python 3.x')
+        exit(1)
+
     main()
diff --git a/nhentai/parser.py b/nhentai/parser.py
index 0df5710..582add2 100644
--- a/nhentai/parser.py
+++ b/nhentai/parser.py
@@ -116,7 +116,7 @@ def doujinshi_parser(id_):
 
     try:
         response = request('get', url)
-        if response.status_code in (200,):
+        if response.status_code in (200, ):
             response = response.content
         elif response.status_code in (404,):
             logger.error("Doujinshi with id {0} cannot be found".format(id_))
diff --git a/nhentai/utils.py b/nhentai/utils.py
index 1ee6e7e..de40d94 100644
--- a/nhentai/utils.py
+++ b/nhentai/utils.py
@@ -4,7 +4,6 @@ from __future__ import unicode_literals, print_function
 import sys
 import re
 import os
-import string
 import zipfile
 import shutil
 import requests
@@ -226,6 +225,13 @@ def generate_pdf(output_dir='.', doujinshi_obj=None, rm_origin_dir=False):
     logger.log(15, 'PDF file has been written to \'{0}\''.format(doujinshi_dir))
 
 
+def unicode_truncate(s, length, encoding='utf-8'):
+    """https://stackoverflow.com/questions/1809531/truncating-unicode-so-it-fits-a-maximum-size-when-encoded-for-wire-transfer
+    """
+    encoded = s.encode(encoding)[:length]
+    return encoded.decode(encoding, 'ignore')
+
+
 def format_filename(s):
     """
     It used to be a whitelist approach allowed only alphabet and a part of symbols.
@@ -235,9 +241,12 @@ def format_filename(s):
     """
     # maybe you can use `--format` to select a suitable filename
     ban_chars = '\\\'/:,;*?"<>|'
-    filename = s.translate(str.maketrans(ban_chars, ' '*len(ban_chars)))
+    filename = s.translate(str.maketrans(ban_chars, ' '*len(ban_chars))).strip()
+    while filename.endswith('.'):
+        filename = filename[:-1]
+
     if len(filename) > 100:
-        filename = filename[:100] + '...]'
+        filename = filename[:100] + u'…'
 
     # Remove [] from filename
     filename = filename.replace('[]', '').strip()