update elements and fix some bugs

lib/src/prism/components/prism-python.js

-Prism.languages.python= { 
+Prism.languages.python= {
         'comment': {
-                pattern: /(^|[^\\])#.*?(\r?\n|$)/,
+                pattern: /(^|[^\\])#.*/,
                 lookbehind: true
         },
-        'string': /"""[\s\S]+?"""|'''[\s\S]+?'''|("|')(\\?.)*?\1/,
+        'string': /"""[\s\S]+?"""|'''[\s\S]+?'''|("|')(?:\\?.)*?\1/,
         'function' : {
-                pattern: /((^|\s)def[ \t]+)([a-zA-Z_][a-zA-Z0-9_]*(?=\())/g,
+                pattern: /((?:^|\s)def[ \t]+)[a-zA-Z_][a-zA-Z0-9_]*(?=\()/g,
                 lookbehind: true
         },
-        'keyword' : /\b(as|assert|break|class|continue|def|del|elif|else|except|exec|finally|for|from|global|if|import|in|is|lambda|pass|print|raise|return|try|while|with|yield)\b/,
-        'boolean' : /\b(True|False)\b/,
-        'number' : /\b-?(0[bo])?(?:(\d|0x[a-f])[\da-f]*\.?\d*|\.\d+)(?:e[+-]?\d+)?j?\b/i,
-        'operator' : /[-+]|<=?|>=?|!|={1,2}|&{1,2}|\|?\||\?|\*|\/|~|\^|%|\b(or|and|not)\b/,
+        'class-name': {
+                pattern: /(\bclass\s+)[a-z0-9_]+/i,
+                lookbehind: true
+        },
+        'keyword' : /\b(?:as|assert|async|await|break|class|continue|def|del|elif|else|except|exec|finally|for|from|global|if|import|in|is|lambda|pass|print|raise|return|try|while|with|yield)\b/,
+        'boolean' : /\b(?:True|False)\b/,
+        'number' : /\b-?(?:0[bo])?(?:(?:\d|0x[\da-f])[\da-f]*\.?\d*|\.\d+)(?:e[+-]?\d+)?j?\b/i,
+        'operator' : /[-+%=]=?|!=|\*\*?=?|\/\/?=?|<[<=>]?|>[=>]?|[&|^~]|\b(?:or|and|not)\b/,
         'punctuation' : /[{}[\];(),.:]/
-};
+};