More changes to example notebooks for Python 3 compatibility

examples/notebooks/Part 1 - Running Code.ipynb

@@ -52,7 +52,7
      "cell_type": "code",
      "collapsed": false,
      "input": [
-      "print a"
+      "print(a)"
      ],
      "language": "python",
      "metadata": {},
@@ -120,7 +120,7
       "import sys\n",
       "from ctypes import CDLL\n",
       "# This will crash a Linux or Mac system; equivalent calls can be made on Windows\n",
-      "dll = 'dylib' if sys.platform == 'darwin' else '.so.6'\n",
+      "dll = 'dylib' if sys.platform == 'darwin' else 'so.6'\n",
       "libc = CDLL(\"libc.%s\" % dll) \n",
       "libc.time(-1)  # BOOM!!"
      ],
@@ -324,7 +324,7
      "input": [
       ">>> the_world_is_flat = 1\n",
       ">>> if the_world_is_flat:\n",
-      "...     print \"Be careful not to fall off!\""
+      "...     print(\"Be careful not to fall off!\")"
      ],
      "language": "python",
      "metadata": {},

examples/notebooks/Part 2 - Basic Output.ipynb

@@ -47,7 +47,8
      "cell_type": "code",
      "collapsed": false,
      "input": [
-      "import numpy as np"
+      "import numpy as np\n",
+      "import sys"
      ],
      "language": "python",
      "metadata": {},
@@ -58,7 +59,7
      "cell_type": "code",
      "collapsed": false,
      "input": [
-      "numpy.random.rand(10)"
+      "np.random.rand(10)"
      ],
      "language": "python",
      "metadata": {},
@@ -113,7 +114,7
      "cell_type": "code",
      "collapsed": false,
      "input": [
-      "print \"hi, stdout\""
+      "print(\"hi, stdout\")"
      ],
      "language": "python",
      "metadata": {},
@@ -132,7 +133,8
      "cell_type": "code",
      "collapsed": false,
      "input": [
-      "print >> sys.stderr, 'hi, stderr'"
+      "from __future__ import print_function\n",
+      "print('hi, stderr', file=sys.stderr)"
      ],
      "language": "python",
      "metadata": {},
@@ -168,7 +170,7
      "input": [
       "import time, sys\n",
       "for i in range(8):\n",
-      "    print i,\n",
+      "    print(i)\n",
       "    time.sleep(0.5)"
      ],
      "language": "python",
@@ -253,7 +255,7
      "collapsed": false,
      "input": [
       "for i in range(50):\n",
-      "    print i"
+      "    print(i)"
      ],
      "language": "python",
      "metadata": {},
@@ -329,7 +331,7
      "collapsed": false,
      "input": [
       "for i in range(500):\n",
-      "    print 2**i - 1"
+      "    print(2**i - 1)"
      ],
      "language": "python",
      "metadata": {},
@@ -862,6 +864,7
      "cell_type": "code",
      "collapsed": false,
      "input": [
+      "from __future__ import print_function\n",
       "import sys"
      ],
      "language": "python",
@@ -881,8 +884,8
      "collapsed": false,
      "input": [
       "%%capture\n",
-      "print 'hi, stdout'\n",
-      "print >> sys.stderr, 'hi, stderr'"
+      "print('hi, stdout')\n",
+      "print('hi, stderr', file=sys.stderr)"
      ],
      "language": "python",
      "metadata": {},
@@ -901,8 +904,8
      "collapsed": false,
      "input": [
       "%%capture captured\n",
-      "print 'hi, stdout'\n",
-      "print >> sys.stderr, 'hi, stderr'"
+      "print('hi, stdout')\n",
+      "print('hi, stderr', file=sys.stderr)"
      ],
      "language": "python",
      "metadata": {},
@@ -1033,13 +1036,13
      "input": [
       "%%capture wontshutup\n",
       "\n",
-      "print \"setting up X\"\n",
+      "print(\"setting up X\")\n",
       "x = np.linspace(0,5,1000)\n",
-      "print \"step 2: constructing y-data\"\n",
+      "print(\"step 2: constructing y-data\")\n",
       "y = np.sin(x)\n",
-      "print \"step 3: display info about y\"\n",
+      "print(\"step 3: display info about y\")\n",
       "plt.plot(x,y)\n",
-      "print \"okay, I'm done now\""
+      "print(\"okay, I'm done now\")"
      ],
      "language": "python",
      "metadata": {},
@@ -1088,8 +1091,8
      "collapsed": false,
      "input": [
       "%%capture cap --no-stderr\n",
-      "print 'hi, stdout'\n",
-      "print >> sys.stderr, \"hello, stderr\""
+      "print('hi, stdout')\n",
+      "print(\"hello, stderr\", file=sys.stderr)"
      ],
      "language": "python",
      "metadata": {},

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

@@ -452,8 +452,9
      "collapsed": false,
      "input": [
       "from IPython.display import HTML\n",
+      "from base64 import b64encode\n",
       "video = open(\"animation.m4v\", \"rb\").read()\n",
-      "video_encoded = video.encode(\"base64\")\n",
+      "video_encoded = b64encode(video)\n",
       "video_tag = '<video controls alt=\"test\" src=\"data:video/x-m4v;base64,{0}\">'.format(video_encoded)\n",
       "HTML(data=video_tag)"
      ],

examples/notebooks/Progress Bars.ipynb

@@ -88,6 +88,7
      "cell_type": "code",
      "collapsed": true,
      "input": [
+      "from __future__ import print_function\n",
       "import sys, time\n",
       "\n",
       "class ProgressBar:\n",
@@ -99,7 +100,7
       "        self.__update_amount(0)\n",
       "\n",
       "    def animate(self, iter):\n",
-      "        print '\\r', self,\n",
+      "        print('\\r', self, end='')\n",
       "        sys.stdout.flush()\n",
       "        self.update_iteration(iter + 1)\n",
       "\n",

examples/notebooks/R Magics.ipynb

@@ -196,7 +196,7
      "input": [
       "b = %R a=resid(lm(Y~X))\n",
       "%Rpull a\n",
-      "print a\n",
+      "print(a)\n",
       "assert id(b.data) == id(a.data)\n",
       "%R -o a"
      ],
@@ -227,8 +227,8
       "%R d=resid(lm(Y~X)); e=coef(lm(Y~X))\n",
       "%R -o d -o e\n",
       "%Rpull e\n",
-      "print d\n",
-      "print e\n",
+      "print(d)\n",
+      "print(e)\n",
       "import numpy as np\n",
       "np.testing.assert_almost_equal(d, a)"
      ],
@@ -320,10 +320,11
      "cell_type": "code",
      "collapsed": false,
      "input": [
+      "from __future__ import print_function\n",
       "v1 = %R plot(X,Y); print(summary(lm(Y~X))); vv=mean(X)*mean(Y)\n",
-      "print 'v1 is:', v1\n",
+      "print('v1 is:', v1)\n",
       "v2 = %R mean(X)*mean(Y)\n",
-      "print 'v2 is:', v2"
+      "print('v2 is:', v2)"
      ],
      "language": "python",
      "metadata": {},
@@ -437,7 +438,7
      "collapsed": false,
      "input": [
       "v = %R print(summary(X)); X\n",
-      "print 'v:', v"
+      "print('v:', v)"
      ],
      "language": "python",
      "metadata": {},
@@ -682,9 +683,9
      "cell_type": "code",
      "collapsed": false,
      "input": [
-      "print seq1\n",
+      "print(seq1)\n",
       "%R -i seq1 -o seq1\n",
-      "print seq1\n",
+      "print(seq1)\n",
       "seq1[0] = 200\n",
       "%R print(seq1)\n",
       "seq1_view = %R seq1\n",
@@ -732,7 +733,7
       "try:\n",
       "    %R -n nosuchvar\n",
       "except Exception as e:\n",
-      "    print e.message\n",
+      "    print(e)\n",
       "    pass"
      ],
      "language": "python",

examples/notebooks/Script Magics.ipynb

@@ -205,8 +205,8
      "cell_type": "code",
      "collapsed": false,
      "input": [
-      "print error\n",
-      "print output"
+      "print(error)\n",
+      "print(output)"
      ],
      "language": "python",
      "metadata": {},
@@ -297,7 +297,7
      "cell_type": "code",
      "collapsed": false,
      "input": [
-      "print ruby_lines.read()"
+      "print(ruby_lines.read())"
      ],
      "language": "python",
      "metadata": {},

examples/notebooks/Trapezoid Rule.ipynb

@@ -121,10 +121,11
      "cell_type": "code",
      "collapsed": false,
      "input": [
+      "from __future__ import print_function\n",
       "from scipy.integrate import quad, trapz\n",
       "integral, error = quad(f, 1, 9)\n",
-      "print \"The integral is:\", integral, \"+/-\", error\n",
-      "print \"The trapezoid approximation with\", len(xint), \"points is:\", trapz(yint, xint)"
+      "print(\"The integral is:\", integral, \"+/-\", error)\n",
+      "print(\"The trapezoid approximation with\", len(xint), \"points is:\", trapz(yint, xint))"
      ],
      "language": "python",
      "metadata": {},