fix #11082 - use dpaste.com, also remove py2 compatibility imports

IPython/core/magics/code.py

@@ -20,6 +20,8 b' import re'
 import sys
 import ast
 from itertools import chain
+from urllib.request import urlopen
+from urllib.parse import urlencode
 
 # Our own packages
 from IPython.core.error import TryNext, StdinNotImplementedError, UsageError
@@ -244,7 +246,7 b' class CodeMagics(Magics):'
 
     @line_magic
     def pastebin(self, parameter_s=''):
-        """Upload code to Github's Gist paste bin, returning the URL.
+        """Upload code to dpaste's paste bin, returning the URL.
 
         Usage:\\
           %pastebin [-d "Custom description"] 1-7
@@ -265,25 +267,14 b' class CodeMagics(Magics):'
             print(e.args[0])
             return
 
-        # Deferred import
-        try:
-            from urllib.request import urlopen # Py 3
-        except ImportError:
-            from urllib2 import urlopen
-        import json
-        post_data = json.dumps({
-          "description": opts.get('d', "Pasted from IPython"),
-          "public": True,
-          "files": {
-            "file1.py": {
+        post_data = urlencode({
+          "title": opts.get('d', "Pasted from IPython"),
+          "syntax": "python3",
               "content": code
-            }
-          }
         }).encode('utf-8')
 
-        response = urlopen("https://api.github.com/gists", post_data)
-        response_data = json.loads(response.read().decode('utf-8'))
-        return response_data['html_url']
+        response = urlopen("http://dpaste.com/api/v2/", post_data)
+        return response.headers.get('Location')
 
     @line_magic
     def loadpy(self, arg_s):