+ from html.parser import HTMLParser
+unescape = HTMLParser().unescape
+# According to https://github.com/python/cpython/blob/master/Lib/html/parser.py#L547 ,
+# in python 3.5 maybe I should use
+# from html import unescape
+# but it is a far-future story:)
+
+
+# Function compatibility
+# xrange, raw_input, map ,unicde
+if sys.version[0] == "2":