[universal] fix issue: "flush" is not available in Python under 3.3

src/you_get/common.py

@@ -1046,6 +1046,22 @@ def set_http_proxy(proxy):
     opener = request.build_opener(proxy_support)
     request.install_opener(opener)
 
+def print_more_compatible(*args, **kwargs):
+    import builtins as __builtin__
+    """Overload default print function as py (<3.3) does not support 'flush' keyword.
+    Although the function name can be same as print to get itself overloaded automatically,
+    I'd rather leave it with a different name and only overload it when importing to make less confusion. """
+    # nothing happens on py3.3 and later
+    if sys.version_info[:2] >= (3, 3):
+        return __builtin__.print(*args, **kwargs)
+
+    # in lower pyver (e.g. 3.2.x), remove 'flush' keyword and flush it as requested
+    doFlush = kwargs.pop('flush', False)
+    ret = __builtin__.print(*args, **kwargs)
+    if doFlush:
+        kwargs.get('file', sys.stdout).flush()
+    return ret
+
 
 
 def download_main(download, download_playlist, urls, playlist, **kwargs):

src/you_get/extractor.py

@@ -1,6 +1,7 @@
 #!/usr/bin/env python
 
 from .common import match1, maybe_print, download_urls, get_filename, parse_host, set_proxy, unset_proxy
+from .common import print_more_compatible as print
 from .util import log
 from . import json_output
 import os

src/you_get/extractors/iqiyi.py

@@ -1,6 +1,7 @@
 #!/usr/bin/env python
 
 from ..common import *
+from ..common import print_more_compatible as print
 from ..extractor import VideoExtractor
 from ..util import log
 from .. import json_output

src/you_get/extractors/netease.py

@@ -4,6 +4,7 @@
 __all__ = ['netease_download']
 
 from ..common import *
+from ..common import print_more_compatible as print
 from ..util import fs
 from json import loads
 import hashlib

src/you_get/processor/ffmpeg.py

@@ -3,6 +3,7 @@
 import os.path
 import subprocess
 from ..util.strings import parameterize
+from ..common import print_more_compatible as print
 
 def get_usable_ffmpeg(cmd):
     try: