Merge pull request #4760 from takluyver/examples-py3compat

Make examples and docs more Python 3 aware

docs/source/interactive/reference.rst

@@ -181,11 +181,11 b' magic, a cell one and one that works in both modes, using just plain functions:'
 
     from IPython.core.magic import (register_line_magic, register_cell_magic,
                                     register_line_cell_magic)
-		
+
     @register_line_magic
     def lmagic(line):
         "my line magic"
-	return line
+        return line
 
     @register_cell_magic
     def cmagic(line, cell):
@@ -195,11 +195,11 b' magic, a cell one and one that works in both modes, using just plain functions:'
     @register_line_cell_magic
     def lcmagic(line, cell=None):
         "Magic that works both as %lcmagic and as %%lcmagic"
-	if cell is None:
-	    print "Called as line magic"
-	    return line
-	else:
-	    print "Called as cell magic"
+        if cell is None:
+            print("Called as line magic")
+            return line
+        else:
+            print("Called as cell magic")
             return line, cell
 
     # We delete these to avoid name conflicts for automagic to work
@@ -212,10 +212,11 b' potentially hold state in between calls, and that have full access to the main'
 IPython object:
     
 .. sourcecode:: python
-		
+
     # This code can be put in any Python module, it does not require IPython
     # itself to be running already.  It only creates the magics subclass but
     # doesn't instantiate it yet.
+    from __future__ import print_function
     from IPython.core.magic import (Magics, magics_class, line_magic,
                                     cell_magic, line_cell_magic)
 
@@ -226,8 +227,8 b' IPython object:'
         @line_magic
         def lmagic(self, line):
             "my line magic"
-            print "Full access to the main IPython object:", self.shell
-            print "Variables in the user namespace:", self.shell.user_ns.keys()
+            print("Full access to the main IPython object:", self.shell)
+            print("Variables in the user namespace:", list(self.shell.user_ns.keys()))
             return line
 
         @cell_magic
@@ -239,10 +240,10 b' IPython object:'
         def lcmagic(self, line, cell=None):
             "Magic that works both as %lcmagic and as %%lcmagic"
             if cell is None:
-                print "Called as line magic"
+                print("Called as line magic")
                 return line
             else:
-                print "Called as cell magic"
+                print("Called as cell magic")
                 return line, cell
 
 
@@ -259,11 +260,11 b' additional state, then you should always call the parent constructor and'
 instantiate the class yourself before registration:
 
 .. sourcecode:: python
-		
+
     @magics_class
     class StatefulMagics(Magics):
         "Magics that hold additional state"
-	
+
         def __init__(self, shell, data):
             # You must call the parent constructor
             super(StatefulMagics, self).__init__(shell)
@@ -288,8 +289,8 b' follows:'
 .. sourcecode:: python
 
     def func(self, line):
-        print "Line magic called with line:", line
-	print "IPython object:", self.shell
+        print("Line magic called with line:", line)
+        print("IPython object:", self.shell)
 
     ip = get_ipython()
     # Declare this function as the magic %mycommand
@@ -961,7 +962,7 b' standard Python tutorial::'
     In [3]: ... a, b = 0, 1
 
     In [4]: >>> while b < 10:
-       ...:     ...     print b
+       ...:     ...     print(b)
        ...:     ...     a, b = b, a+b
        ...:     
     1

docs/source/interactive/tips.rst

@@ -62,7 +62,7 b' mechanism, this is automatically stored::'
 
     hello - this is a temporary file
 
-    Out[1]: "print 'hello - this is a temporary file'\n"
+    Out[1]: "print('hello - this is a temporary file')\n"
 
 Now, if you call ``%edit -p``, IPython tries to open an editor with the
 same data as the last time you used %edit. So if you haven't used %edit
@@ -82,7 +82,7 b' Continuing with the example above, this should illustrate this idea::'
 
     hello - now I made some changes
 
-    Out[2]: "print 'hello - now I made some changes'\n"
+    Out[2]: "print('hello - now I made some changes')\n"
 
     In [3]: edit _1
 
@@ -94,7 +94,7 b' Continuing with the example above, this should illustrate this idea::'
 
     IPython version control at work :)
 
-    Out[3]: "print 'hello - this is a temporary file'\nprint 'IPython version control at work :)'\n"
+    Out[3]: "print('hello - this is a temporary file')\nprint('IPython version control at work :)')\n"
 
 
 This section was written after a contribution by Alexander Belchenko on

examples/core/appconfig.py

@@ -30,8 +30,6 b' When the config attribute of an Application is updated, it will fire all of'
 the trait's events for all of the config=True attributes.
 """
 
-import sys
-
 from IPython.config.configurable import Configurable
 from IPython.config.application import Application
 from IPython.utils.traitlets import (
@@ -87,8 +85,8 b' class MyApp(Application):'
         self.init_bar()
     
     def start(self):
-        print "app.config:"
-        print self.config
+        print("app.config:")
+        print(self.config)
 
 
 def main():

examples/core/ipython-get-history.py

@@ -17,7 +17,6 b' to build much more flexible and powerful tools to browse and pull from the'
 history database.
 """
 import sys
-import codecs
 
 from IPython.core.history import HistoryAccessor
 
@@ -34,5 +33,5 b' dest.write("# coding: utf-8\\n")'
 hist = HistoryAccessor()
 
 for session, lineno, cell in hist.get_range(session=session_number, raw=raw):
-    # To use this in Python 3, remove the .encode() here:
-    dest.write(cell.encode('utf-8') + '\n')
+    cell = cell.encode('utf-8')  # This line is only needed on Python 2.
+    dest.write(cell + '\n')

examples/inprocess/embedded_qtconsole.py

@@ -1,3 +1,4 b''
+from __future__ import print_function
 import os
 
 from IPython.qt.console.rich_ipython_widget import RichIPythonWidget
@@ -6,7 +7,7 b' from IPython.lib import guisupport'
 
 
 def print_process_id():
-    print 'Process ID is:', os.getpid()
+    print('Process ID is:', os.getpid())
 
 
 def main():

examples/inprocess/embedded_terminal.py

@@ -1,3 +1,4 b''
+from __future__ import print_function
 import os
 
 from IPython.kernel.inprocess import InProcessKernelManager
@@ -5,7 +6,7 b' from IPython.terminal.console.interactiveshell import ZMQTerminalInteractiveShel'
 
 
 def print_process_id():
-    print 'Process ID is:', os.getpid()
+    print('Process ID is:', os.getpid())
 
 
 def main():

examples/lib/BackgroundJobs.ipynb

@@ -1,6 +1,6 b''
 {
  "metadata": {
-  "name": "BackgroundJobs"
+  "name": ""
  },
  "nbformat": 3,
  "nbformat_minor": 0,
@@ -20,6 +20,7 b''
      "cell_type": "code",
      "collapsed": false,
      "input": [
+      "from __future__ import print_function\n",
       "from IPython.lib import backgroundjobs as bg\n",
       "\n",
       "import sys\n",
@@ -39,15 +40,15 b''
       "def printfunc(interval=1, reps=5):\n",
       "    for n in range(reps):\n",
       "        time.sleep(interval)\n",
-      "        print 'In the background...', n\n",
+      "        print('In the background...', n)\n",
       "        sys.stdout.flush()\n",
-      "    print 'All done!'\n",
+      "    print('All done!')\n",
       "    sys.stdout.flush()"
      ],
      "language": "python",
      "metadata": {},
      "outputs": [],
-     "prompt_number": 35
+     "prompt_number": 1
     },
     {
      "cell_type": "markdown",
@@ -87,37 +88,9 b''
         "Starting job # 4 in a separate thread.\n",
         "Starting job # 5 in a separate thread.\n"
        ]
-      },
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "In the background... 0\n"
-       ]
-      },
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "In the background... 1\n"
-       ]
-      },
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "In the background... 2\n"
-       ]
-      },
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "All done!\n"
-       ]
       }
      ],
-     "prompt_number": 36
+     "prompt_number": 2
     },
     {
      "cell_type": "markdown",
@@ -139,19 +112,27 b''
        "output_type": "stream",
        "stream": "stdout",
        "text": [
-        "Completed jobs:\n",
-        "0 : <function sleepfunc at 0x30e1578>\n",
-        "2 : <function sleepfunc at 0x30e1578>\n",
+        "In the background... 0\n",
+        "Running jobs:"
+       ]
+      },
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "\n",
+        "0 : <function sleepfunc at 0x7f2a1c9963b0>\n",
+        "2 : <function sleepfunc at 0x7f2a1c9963b0>\n",
         "3 : printfunc(1,3)\n",
+        "5 : <function diefunc at 0x7f2a1c996440>\n",
         "\n",
         "Dead jobs:\n",
-        "4 : &lt;function diefunc at 0x304d488&gt;\n",
-        "5 : &lt;function diefunc at 0x304d488&gt;\n",
+        "4 : <function diefunc at 0x7f2a1c996440>\n",
         "\n"
        ]
       }
      ],
-     "prompt_number": 37
+     "prompt_number": 3
     },
     {
      "cell_type": "markdown",
@@ -170,8 +151,18 b''
      ],
      "language": "python",
      "metadata": {},
-     "outputs": [],
-     "prompt_number": 43
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "In the background... 1\n",
+        "In the background... 2\n",
+        "All done!\n"
+       ]
+      }
+     ],
+     "prompt_number": 4
     },
     {
      "cell_type": "markdown",
@@ -193,29 +184,15 b''
      "metadata": {},
      "outputs": [
       {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Status of diejob1: Dead (Exception), call jobs.traceback() for details\n",
-        "<span class=\"ansired\">---------------------------------------------------------------------------</span>\n",
-        "<span class=\"ansired\">Exception</span>                                 Traceback (most recent call last)\n",
-        "<span class=\"ansigreen\">/home/fperez/usr/lib/python2.6/site-packages/IPython/lib/backgroundjobs.py</span> in <span class=\"ansicyan\">call</span><span class=\"ansiblue\">(self)</span>\n",
-        "<span class=\"ansigreen\">    462</span> <span class=\"ansiyellow\"></span>\n",
-        "<span class=\"ansigreen\">    463</span>     <span class=\"ansigreen\">def</span> call<span class=\"ansiyellow\">(</span>self<span class=\"ansiyellow\">)</span><span class=\"ansiyellow\">:</span><span class=\"ansiyellow\"></span>\n",
-        "<span class=\"ansigreen\">--&gt; 464</span><span class=\"ansiyellow\">         </span><span class=\"ansigreen\">return</span> self<span class=\"ansiyellow\">.</span>func<span class=\"ansiyellow\">(</span><span class=\"ansiyellow\">*</span>self<span class=\"ansiyellow\">.</span>args<span class=\"ansiyellow\">,</span> <span class=\"ansiyellow\">**</span>self<span class=\"ansiyellow\">.</span>kwargs<span class=\"ansiyellow\">)</span><span class=\"ansiyellow\"></span>\n",
-        "\n",
-        "<span class=\"ansigreen\">/home/fperez/ipython/ipython/docs/examples/lib/&lt;ipython-input-15-54795a097787&gt;</span> in <span class=\"ansicyan\">diefunc</span><span class=\"ansiblue\">(interval, *a, **kw)</span>\n",
-        "<span class=\"ansigreen\">     14</span> <span class=\"ansigreen\">def</span> diefunc<span class=\"ansiyellow\">(</span>interval<span class=\"ansiyellow\">=</span><span class=\"ansicyan\">2</span><span class=\"ansiyellow\">,</span> <span class=\"ansiyellow\">*</span>a<span class=\"ansiyellow\">,</span> <span class=\"ansiyellow\">**</span>kw<span class=\"ansiyellow\">)</span><span class=\"ansiyellow\">:</span><span class=\"ansiyellow\"></span>\n",
-        "<span class=\"ansigreen\">     15</span>     time<span class=\"ansiyellow\">.</span>sleep<span class=\"ansiyellow\">(</span>interval<span class=\"ansiyellow\">)</span><span class=\"ansiyellow\"></span>\n",
-        "<span class=\"ansigreen\">---&gt; 16</span><span class=\"ansiyellow\">     </span><span class=\"ansigreen\">raise</span> Exception<span class=\"ansiyellow\">(</span><span class=\"ansiblue\">&quot;Dead job with interval %s&quot;</span> <span class=\"ansiyellow\">%</span> interval<span class=\"ansiyellow\">)</span><span class=\"ansiyellow\"></span>\n",
-        "<span class=\"ansigreen\">     17</span> <span class=\"ansiyellow\"></span>\n",
-        "<span class=\"ansigreen\">     18</span> <span class=\"ansigreen\">def</span> printfunc<span class=\"ansiyellow\">(</span>interval<span class=\"ansiyellow\">=</span><span class=\"ansicyan\">1</span><span class=\"ansiyellow\">,</span> reps<span class=\"ansiyellow\">=</span><span class=\"ansicyan\">5</span><span class=\"ansiyellow\">)</span><span class=\"ansiyellow\">:</span><span class=\"ansiyellow\"></span>\n",
-        "\n",
-        "<span class=\"ansired\">Exception</span>: Dead job with interval 1\n"
+       "ename": "SyntaxError",
+       "evalue": "invalid syntax (<ipython-input-5-a90bd59af669>, line 1)",
+       "output_type": "pyerr",
+       "traceback": [
+        "\u001b[1;36m  File \u001b[1;32m\"<ipython-input-5-a90bd59af669>\"\u001b[1;36m, line \u001b[1;32m1\u001b[0m\n\u001b[1;33m    print \"Status of diejob1:\", diejob1.status\u001b[0m\n\u001b[1;37m                             ^\u001b[0m\n\u001b[1;31mSyntaxError\u001b[0m\u001b[1;31m:\u001b[0m invalid syntax\n"
        ]
       }
      ],
-     "prompt_number": 34
+     "prompt_number": 5
     },
     {
      "cell_type": "markdown",
@@ -237,44 +214,44 b''
        "output_type": "stream",
        "stream": "stdout",
        "text": [
-        "Traceback for: &lt;BackgroundJob #4: &lt;function diefunc at 0x30df758&gt;&gt;\n",
-        "<span class=\"ansired\">---------------------------------------------------------------------------</span>\n",
-        "<span class=\"ansired\">Exception</span>                                 Traceback (most recent call last)\n",
-        "<span class=\"ansigreen\">/home/fperez/usr/lib/python2.6/site-packages/IPython/lib/backgroundjobs.py</span> in <span class=\"ansicyan\">call</span><span class=\"ansiblue\">(self)</span>\n",
-        "<span class=\"ansigreen\">    462</span> <span class=\"ansiyellow\"></span>\n",
-        "<span class=\"ansigreen\">    463</span>     <span class=\"ansigreen\">def</span> call<span class=\"ansiyellow\">(</span>self<span class=\"ansiyellow\">)</span><span class=\"ansiyellow\">:</span><span class=\"ansiyellow\"></span>\n",
-        "<span class=\"ansigreen\">--&gt; 464</span><span class=\"ansiyellow\">         </span><span class=\"ansigreen\">return</span> self<span class=\"ansiyellow\">.</span>func<span class=\"ansiyellow\">(</span><span class=\"ansiyellow\">*</span>self<span class=\"ansiyellow\">.</span>args<span class=\"ansiyellow\">,</span> <span class=\"ansiyellow\">**</span>self<span class=\"ansiyellow\">.</span>kwargs<span class=\"ansiyellow\">)</span><span class=\"ansiyellow\"></span>\n",
+        "Traceback for: <BackgroundJob #4: <function diefunc at 0x7f2a1c996440>>\n",
+        "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m\n",
+        "\u001b[1;31mException\u001b[0m                                 Traceback (most recent call last)\n",
+        "\u001b[1;32m/home/takluyver/.local/lib/python3.3/site-packages/IPython/lib/backgroundjobs.py\u001b[0m in \u001b[0;36mcall\u001b[1;34m(self)\u001b[0m\n",
+        "\u001b[0;32m    489\u001b[0m \u001b[1;33m\u001b[0m\u001b[0m\n",
+        "\u001b[0;32m    490\u001b[0m     \u001b[1;32mdef\u001b[0m \u001b[0mcall\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mself\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m:\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n",
+        "\u001b[1;32m--> 491\u001b[1;33m         \u001b[1;32mreturn\u001b[0m \u001b[0mself\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mfunc\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;33m*\u001b[0m\u001b[0mself\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0margs\u001b[0m\u001b[1;33m,\u001b[0m \u001b[1;33m**\u001b[0m\u001b[0mself\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mkwargs\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n",
+        "\u001b[0m\n",
+        "\u001b[1;32m<ipython-input-1-7391f8ae281b>\u001b[0m in \u001b[0;36mdiefunc\u001b[1;34m(interval, *a, **kw)\u001b[0m\n",
+        "\u001b[0;32m     14\u001b[0m \u001b[1;32mdef\u001b[0m \u001b[0mdiefunc\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0minterval\u001b[0m\u001b[1;33m=\u001b[0m\u001b[1;36m2\u001b[0m\u001b[1;33m,\u001b[0m \u001b[1;33m*\u001b[0m\u001b[0ma\u001b[0m\u001b[1;33m,\u001b[0m \u001b[1;33m**\u001b[0m\u001b[0mkw\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m:\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n",
+        "\u001b[0;32m     15\u001b[0m     \u001b[0mtime\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0msleep\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0minterval\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n",
+        "\u001b[1;32m---> 16\u001b[1;33m     \u001b[1;32mraise\u001b[0m \u001b[0mException\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;34m\"Dead job with interval %s\"\u001b[0m \u001b[1;33m%\u001b[0m \u001b[0minterval\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n",
+        "\u001b[0m\u001b[0;32m     17\u001b[0m \u001b[1;33m\u001b[0m\u001b[0m\n",
+        "\u001b[0;32m     18\u001b[0m \u001b[1;32mdef\u001b[0m \u001b[0mprintfunc\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0minterval\u001b[0m\u001b[1;33m=\u001b[0m\u001b[1;36m1\u001b[0m\u001b[1;33m,\u001b[0m \u001b[0mreps\u001b[0m\u001b[1;33m=\u001b[0m\u001b[1;36m5\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m:\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n",
         "\n",
-        "<span class=\"ansigreen\">/home/fperez/ipython/ipython/docs/examples/lib/&lt;ipython-input-15-54795a097787&gt;</span> in <span class=\"ansicyan\">diefunc</span><span class=\"ansiblue\">(interval, *a, **kw)</span>\n",
-        "<span class=\"ansigreen\">     14</span> <span class=\"ansigreen\">def</span> diefunc<span class=\"ansiyellow\">(</span>interval<span class=\"ansiyellow\">=</span><span class=\"ansicyan\">2</span><span class=\"ansiyellow\">,</span> <span class=\"ansiyellow\">*</span>a<span class=\"ansiyellow\">,</span> <span class=\"ansiyellow\">**</span>kw<span class=\"ansiyellow\">)</span><span class=\"ansiyellow\">:</span><span class=\"ansiyellow\"></span>\n",
-        "<span class=\"ansigreen\">     15</span>     time<span class=\"ansiyellow\">.</span>sleep<span class=\"ansiyellow\">(</span>interval<span class=\"ansiyellow\">)</span><span class=\"ansiyellow\"></span>\n",
-        "<span class=\"ansigreen\">---&gt; 16</span><span class=\"ansiyellow\">     </span><span class=\"ansigreen\">raise</span> Exception<span class=\"ansiyellow\">(</span><span class=\"ansiblue\">&quot;Dead job with interval %s&quot;</span> <span class=\"ansiyellow\">%</span> interval<span class=\"ansiyellow\">)</span><span class=\"ansiyellow\"></span>\n",
-        "<span class=\"ansigreen\">     17</span> <span class=\"ansiyellow\"></span>\n",
-        "<span class=\"ansigreen\">     18</span> <span class=\"ansigreen\">def</span> printfunc<span class=\"ansiyellow\">(</span>interval<span class=\"ansiyellow\">=</span><span class=\"ansicyan\">1</span><span class=\"ansiyellow\">,</span> reps<span class=\"ansiyellow\">=</span><span class=\"ansicyan\">5</span><span class=\"ansiyellow\">)</span><span class=\"ansiyellow\">:</span><span class=\"ansiyellow\"></span>\n",
+        "\u001b[1;31mException\u001b[0m: Dead job with interval 1\n",
         "\n",
-        "<span class=\"ansired\">Exception</span>: Dead job with interval 1\n",
+        "Traceback for: <BackgroundJob #5: <function diefunc at 0x7f2a1c996440>>\n",
+        "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m\n",
+        "\u001b[1;31mException\u001b[0m                                 Traceback (most recent call last)\n",
+        "\u001b[1;32m/home/takluyver/.local/lib/python3.3/site-packages/IPython/lib/backgroundjobs.py\u001b[0m in \u001b[0;36mcall\u001b[1;34m(self)\u001b[0m\n",
+        "\u001b[0;32m    489\u001b[0m \u001b[1;33m\u001b[0m\u001b[0m\n",
+        "\u001b[0;32m    490\u001b[0m     \u001b[1;32mdef\u001b[0m \u001b[0mcall\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mself\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m:\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n",
+        "\u001b[1;32m--> 491\u001b[1;33m         \u001b[1;32mreturn\u001b[0m \u001b[0mself\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mfunc\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;33m*\u001b[0m\u001b[0mself\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0margs\u001b[0m\u001b[1;33m,\u001b[0m \u001b[1;33m**\u001b[0m\u001b[0mself\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mkwargs\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n",
+        "\u001b[0m\n",
+        "\u001b[1;32m<ipython-input-1-7391f8ae281b>\u001b[0m in \u001b[0;36mdiefunc\u001b[1;34m(interval, *a, **kw)\u001b[0m\n",
+        "\u001b[0;32m     14\u001b[0m \u001b[1;32mdef\u001b[0m \u001b[0mdiefunc\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0minterval\u001b[0m\u001b[1;33m=\u001b[0m\u001b[1;36m2\u001b[0m\u001b[1;33m,\u001b[0m \u001b[1;33m*\u001b[0m\u001b[0ma\u001b[0m\u001b[1;33m,\u001b[0m \u001b[1;33m**\u001b[0m\u001b[0mkw\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m:\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n",
+        "\u001b[0;32m     15\u001b[0m     \u001b[0mtime\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0msleep\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0minterval\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n",
+        "\u001b[1;32m---> 16\u001b[1;33m     \u001b[1;32mraise\u001b[0m \u001b[0mException\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;34m\"Dead job with interval %s\"\u001b[0m \u001b[1;33m%\u001b[0m \u001b[0minterval\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n",
+        "\u001b[0m\u001b[0;32m     17\u001b[0m \u001b[1;33m\u001b[0m\u001b[0m\n",
+        "\u001b[0;32m     18\u001b[0m \u001b[1;32mdef\u001b[0m \u001b[0mprintfunc\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0minterval\u001b[0m\u001b[1;33m=\u001b[0m\u001b[1;36m1\u001b[0m\u001b[1;33m,\u001b[0m \u001b[0mreps\u001b[0m\u001b[1;33m=\u001b[0m\u001b[1;36m5\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m:\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n",
         "\n",
-        "Traceback for: &lt;BackgroundJob #5: &lt;function diefunc at 0x30df758&gt;&gt;\n",
-        "<span class=\"ansired\">---------------------------------------------------------------------------</span>\n",
-        "<span class=\"ansired\">Exception</span>                                 Traceback (most recent call last)\n",
-        "<span class=\"ansigreen\">/home/fperez/usr/lib/python2.6/site-packages/IPython/lib/backgroundjobs.py</span> in <span class=\"ansicyan\">call</span><span class=\"ansiblue\">(self)</span>\n",
-        "<span class=\"ansigreen\">    462</span> <span class=\"ansiyellow\"></span>\n",
-        "<span class=\"ansigreen\">    463</span>     <span class=\"ansigreen\">def</span> call<span class=\"ansiyellow\">(</span>self<span class=\"ansiyellow\">)</span><span class=\"ansiyellow\">:</span><span class=\"ansiyellow\"></span>\n",
-        "<span class=\"ansigreen\">--&gt; 464</span><span class=\"ansiyellow\">         </span><span class=\"ansigreen\">return</span> self<span class=\"ansiyellow\">.</span>func<span class=\"ansiyellow\">(</span><span class=\"ansiyellow\">*</span>self<span class=\"ansiyellow\">.</span>args<span class=\"ansiyellow\">,</span> <span class=\"ansiyellow\">**</span>self<span class=\"ansiyellow\">.</span>kwargs<span class=\"ansiyellow\">)</span><span class=\"ansiyellow\"></span>\n",
-        "\n",
-        "<span class=\"ansigreen\">/home/fperez/ipython/ipython/docs/examples/lib/&lt;ipython-input-15-54795a097787&gt;</span> in <span class=\"ansicyan\">diefunc</span><span class=\"ansiblue\">(interval, *a, **kw)</span>\n",
-        "<span class=\"ansigreen\">     14</span> <span class=\"ansigreen\">def</span> diefunc<span class=\"ansiyellow\">(</span>interval<span class=\"ansiyellow\">=</span><span class=\"ansicyan\">2</span><span class=\"ansiyellow\">,</span> <span class=\"ansiyellow\">*</span>a<span class=\"ansiyellow\">,</span> <span class=\"ansiyellow\">**</span>kw<span class=\"ansiyellow\">)</span><span class=\"ansiyellow\">:</span><span class=\"ansiyellow\"></span>\n",
-        "<span class=\"ansigreen\">     15</span>     time<span class=\"ansiyellow\">.</span>sleep<span class=\"ansiyellow\">(</span>interval<span class=\"ansiyellow\">)</span><span class=\"ansiyellow\"></span>\n",
-        "<span class=\"ansigreen\">---&gt; 16</span><span class=\"ansiyellow\">     </span><span class=\"ansigreen\">raise</span> Exception<span class=\"ansiyellow\">(</span><span class=\"ansiblue\">&quot;Dead job with interval %s&quot;</span> <span class=\"ansiyellow\">%</span> interval<span class=\"ansiyellow\">)</span><span class=\"ansiyellow\"></span>\n",
-        "<span class=\"ansigreen\">     17</span> <span class=\"ansiyellow\"></span>\n",
-        "<span class=\"ansigreen\">     18</span> <span class=\"ansigreen\">def</span> printfunc<span class=\"ansiyellow\">(</span>interval<span class=\"ansiyellow\">=</span><span class=\"ansicyan\">1</span><span class=\"ansiyellow\">,</span> reps<span class=\"ansiyellow\">=</span><span class=\"ansicyan\">5</span><span class=\"ansiyellow\">)</span><span class=\"ansiyellow\">:</span><span class=\"ansiyellow\"></span>\n",
-        "\n",
-        "<span class=\"ansired\">Exception</span>: Dead job with interval 2\n",
+        "\u001b[1;31mException\u001b[0m: Dead job with interval 2\n",
         "\n"
        ]
       }
      ],
-     "prompt_number": 33
+     "prompt_number": 6
     },
     {
      "cell_type": "markdown",
@@ -296,11 +273,12 b''
        "output_type": "stream",
        "stream": "stdout",
        "text": [
-        "No jobs to flush.\n"
+        "Flushing 3 Completed jobs.\n",
+        "Flushing 2 Dead jobs.\n"
        ]
       }
      ],
-     "prompt_number": 25
+     "prompt_number": 7
     },
     {
      "cell_type": "markdown",
@@ -318,7 +296,7 b''
      "language": "python",
      "metadata": {},
      "outputs": [],
-     "prompt_number": 27
+     "prompt_number": 8
     },
     {
      "cell_type": "markdown",
@@ -332,10 +310,10 b''
      "collapsed": false,
      "input": [
       "j = jobs.new(sleepfunc, 2)\n",
-      "print \"Will wait for j now...\"\n",
+      "print(\"Will wait for j now...\")\n",
       "sys.stdout.flush()\n",
       "j.join()\n",
-      "print \"Result from j:\"\n",
+      "print(\"Result from j:\")\n",
       "j.result"
      ],
      "language": "python",
@@ -345,7 +323,7 b''
        "output_type": "stream",
        "stream": "stdout",
        "text": [
-        "Starting job # 7 in a separate thread.\n",
+        "Starting job # 0 in a separate thread.\n",
         "Will wait for j now...\n"
        ]
       },
@@ -357,14 +335,15 b''
        ]
       },
       {
+       "metadata": {},
        "output_type": "pyout",
-       "prompt_number": 46,
+       "prompt_number": 9,
        "text": [
-        "{&apos;args&apos;: (), &apos;interval&apos;: 2, &apos;kwargs&apos;: {}}"
+        "{'kwargs': {}, 'args': (), 'interval': 2}"
        ]
       }
      ],
-     "prompt_number": 46
+     "prompt_number": 9
     },
     {
      "cell_type": "code",

examples/lib/gui-qt.py

@@ -10,7 +10,6 b' In [6]: %run gui-qt.py'
 Ref: Modified from http://zetcode.com/tutorials/pyqt4/firstprograms/
 """
 
-import sys
 from PyQt4 import QtGui, QtCore
 
 class SimpleWindow(QtGui.QWidget):

examples/lib/gui-tk.py

@@ -8,7 +8,10 b' In [5]: %gui tk'
 In [6]: %run gui-tk.py
 """
 
-from Tkinter import *
+try:
+    from tkinter import *  # Python 3
+except ImportError:
+    from Tkinter import *  # Python 2
 
 class MyApp:
 

examples/lib/internal_ipkernel.py

@@ -2,7 +2,6 b''
 # Imports
 #-----------------------------------------------------------------------------
 
-import subprocess
 import sys
 
 from IPython.lib.kernel import connect_qtconsole
@@ -42,7 +41,7 b' class InternalIPKernel(object):'
 
     def print_namespace(self, evt=None):
         print("\n***Variables in User namespace***")
-        for k, v in self.namespace.iteritems():
+        for k, v in self.namespace.items():
             if k not in self._init_keys and not k.startswith('_'):
                 print('%s -> %r' % (k, v))
         sys.stdout.flush()

examples/notebooks/Frontend-Kernel Model.ipynb

@@ -153,9 +153,8 b''
      "collapsed": false,
      "input": [
       "# Python 3 compat\n",
-      "try:\n",
-      "    raw_input\n",
-      "except NameError:\n",
+      "import sys\n",
+      "if sys.version_info[0] >= 3:\n",
       "    raw_input = input"
      ],
      "language": "python",

examples/notebooks/Importing Notebooks.ipynb

@@ -157,7 +157,7 b''
       "                # transform the input to executable Python\n",
       "                code = self.shell.input_transformer_manager.transform_cell(cell.input)\n",
       "                # run the code in themodule\n",
-      "                exec code in mod.__dict__\n",
+      "                exec(code, mod.__dict__)\n",
       "        finally:\n",
       "            self.shell.user_ns = save_user_ns\n",
       "        return mod\n"

examples/notebooks/Part 5 - Rich Display System.ipynb

@@ -989,24 +989,6 b''
      "cell_type": "markdown",
      "metadata": {},
      "source": [
-      "By default, `DataFrames` will be represented as text; to enable HTML representations we need to set a print option:"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "pandas.core.format.set_printoptions(notebook_repr_html=True)"
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": [],
-     "prompt_number": 9
-    },
-    {
-     "cell_type": "markdown",
-     "metadata": {},
-     "source": [
       "Here is a small amount of stock data for APPL:"
      ]
     },

examples/parallel/Parallel Magics.ipynb

@@ -67,7 +67,7 b''
      "cell_type": "code",
      "collapsed": false,
      "input": [
-      "%px print a"
+      "%px print(a)"
      ],
      "language": "python",
      "metadata": {},
@@ -98,7 +98,8 b''
      "cell_type": "code",
      "collapsed": false,
      "input": [
-      "%px print >> sys.stderr, \"ERROR\""
+      "%px from __future__ import print_function\n",
+      "%px print(\"ERROR\", file=sys.stderr)"
      ],
      "language": "python",
      "metadata": {},
@@ -208,7 +209,7 b''
       "%%px --noblock\n",
       "x = np.linspace(0,np.pi,1000)\n",
       "for n in range(id,12, stride):\n",
-      "    print n\n",
+      "    print(n)\n",
       "    plt.plot(x,np.sin(n*x))\n",
       "plt.title(\"Plot %i\" % id)"
      ],
@@ -248,7 +249,7 b''
       "%%px --group-outputs=engine\n",
       "x = np.linspace(0,np.pi,1000)\n",
       "for n in range(id+1,12, stride):\n",
-      "    print n\n",
+      "    print(n)\n",
       "    plt.figure()\n",
       "    plt.plot(x,np.sin(n*x))\n",
       "    plt.title(\"Plot %i\" % n)"
@@ -296,6 +297,8 b''
      "cell_type": "code",
      "collapsed": false,
      "input": [
+      "from __future__ import print_function\n",
+      "\n",
       "def generate_output():\n",
       "    \"\"\"function for testing output\n",
       "    \n",
@@ -305,13 +308,13 b''
       "    import sys,os\n",
       "    from IPython.display import display, HTML, Math\n",
       "    \n",
-      "    print \"stdout\"\n",
-      "    print >> sys.stderr, \"stderr\"\n",
+      "    print(\"stdout\")\n",
+      "    print(\"stderr\", file=sys.stderr)\n",
       "    \n",
       "    display(HTML(\"<b>HTML</b>\"))\n",
       "    \n",
-      "    print \"stdout2\"\n",
-      "    print >> sys.stderr, \"stderr2\"\n",
+      "    print(\"stdout2\")\n",
+      "    print(\"stderr2\", file=sys.stderr)\n",
       "    \n",
       "    display(Math(r\"\\alpha=\\beta\"))\n",
       "    \n",
@@ -461,7 +464,7 b''
      "cell_type": "markdown",
      "metadata": {},
      "source": [
-      "As of IPython 0.14, you can instruct `%%px` to also execute the cell locally.\n",
+      "As of IPython 1.0, you can instruct `%%px` to also execute the cell locally.\n",
       "This is useful for interactive definitions,\n",
       "or if you want to load a data source everywhere,\n",
       "not just on the engines."
@@ -474,7 +477,7 b''
       "%%px --local\n",
       "import os\n",
       "thispid = os.getpid()\n",
-      "print thispid"
+      "print(thispid)"
      ],
      "language": "python",
      "metadata": {},

examples/parallel/helloworld.ipynb

@@ -1,6 +1,6 b''
 {
  "metadata": {
-  "name": "helloworld"
+  "name": ""
  },
  "nbformat": 3,
  "nbformat_minor": 0,
@@ -20,6 +20,7 b''
      "cell_type": "code",
      "collapsed": true,
      "input": [
+      "from __future__ import print_function\n",
       "from IPython.parallel import Client"
      ],
      "language": "python",
@@ -69,8 +70,8 b''
      "cell_type": "code",
      "collapsed": false,
      "input": [
-      "print \"Submitted tasks:\", hello.msg_ids + world.msg_ids\n",
-      "print hello.get(), world.get()"
+      "print(\"Submitted tasks:\", hello.msg_ids + world.msg_ids)\n",
+      "print(hello.get(), world.get())"
      ],
      "language": "python",
      "metadata": {},

examples/parallel/task1.ipynb

@@ -18,6 +18,7 b''
      "cell_type": "code",
      "collapsed": true,
      "input": [
+      "from __future__ import print_function\n",
       "from IPython.parallel import Client"
      ],
      "language": "python",
@@ -110,7 +111,7 b''
      "cell_type": "code",
      "collapsed": false,
      "input": [
-      "print \"a, b, c: \", ar.get()"
+      "print(\"a, b, c: \", ar.get())"
      ],
      "language": "python",
      "metadata": {},

examples/parallel/taskmap.ipynb

@@ -1,6 +1,6 b''
 {
  "metadata": {
-  "name": "taskmap"
+  "name": ""
  },
  "nbformat": 3,
  "nbformat_minor": 0,
@@ -18,6 +18,7 b''
      "cell_type": "code",
      "collapsed": true,
      "input": [
+      "from __future__ import print_function\n",
       "from IPython.parallel import Client"
      ],
      "language": "python",
@@ -42,7 +43,7 b''
      "collapsed": false,
      "input": [
       "result = v.map(lambda x: 2*x, range(10))\n",
-      "print \"Simple, default map: \", list(result)"
+      "print(\"Simple, default map: \", list(result))"
      ],
      "language": "python",
      "metadata": {},
@@ -69,9 +70,9 b''
      "collapsed": false,
      "input": [
       "ar = v.map_async(lambda x: 2*x, range(10))\n",
-      "print \"Submitted tasks, got ids: \", ar.msg_ids\n",
+      "print(\"Submitted tasks, got ids: \", ar.msg_ids)\n",
       "result = ar.get()\n",
-      "print \"Using a mapper: \", result"
+      "print(\"Using a mapper: \", result)"
      ],
      "language": "python",
      "metadata": {},
@@ -95,7 +96,7 b''
       "def f(x): return 2*x\n",
       "\n",
       "result = f.map(range(10))\n",
-      "print \"Using a parallel function: \", result"
+      "print(\"Using a parallel function: \", result)"
      ],
      "language": "python",
      "metadata": {},

examples/tests/Test Output Callbacks.ipynb

@@ -29,7 +29,7 b''
      "cell_type": "code",
      "collapsed": false,
      "input": [
-      "print 'hi'"
+      "print('hi')"
      ],
      "language": "python",
      "metadata": {},
@@ -180,7 +180,7 b''
      "cell_type": "code",
      "collapsed": false,
      "input": [
-      "# press tab after parentheses\n",
+      "# press shift-tab after parentheses\n",
       "int("
      ],
      "language": "python",
@@ -199,7 +199,7 b''
      "cell_type": "code",
      "collapsed": false,
      "input": [
-      "# pres tab after f\n",
+      "# press tab after f\n",
       "f"
      ],
      "language": "python",
@@ -218,7 +218,7 b''
      "cell_type": "code",
      "collapsed": false,
      "input": [
-      "import sys\n",
+      "import sys, time\n",
       "from IPython.display import clear_output"
      ],
      "language": "python",
@@ -232,7 +232,7 b''
       "for i in range(10):\n",
       "    clear_output()\n",
       "    time.sleep(0.25)\n",
-      "    print i\n",
+      "    print(i)\n",
       "    sys.stdout.flush()\n",
       "    time.sleep(0.25)\n"
      ],
@@ -247,7 +247,7 b''
       "for i in range(10):\n",
       "    clear_output(wait=True)\n",
       "    time.sleep(0.25)\n",
-      "    print i\n",
+      "    print(i)\n",
       "    sys.stdout.flush()\n"
      ],
      "language": "python",