Remove {.python} and {.output} from markdown cells - breaks rendering

  sed -i '' 's/ {.python}//'  *.ipynb
  sed -i '' 's/ {.output}//' *.ipynb

Author: dleehr

01-intro.ipynb

@@ -864,7 +864,7 @@
     "\n",
     "Draw diagrams showing what variables refer to what values after each statement in the following program:\n",
     "\n",
-    "~~~ {.python}\n",
+    "~~~\n",
     "mass = 47.5\n",
     "age = 122\n",
     "mass = mass * 2.0\n",
@@ -875,7 +875,7 @@
     "\n",
     "What does the following program print out?\n",
     "\n",
-    "~~~ {.python}\n",
+    "~~~\n",
     "first, second = 'Grace', 'Hopper'\n",
     "third, fourth = second, first\n",
     "print third, fourth\n",
@@ -886,13 +886,13 @@
     "A section of a data frame is called a [slice](reference.html#slice).\n",
     "We can take slices of character strings as well:\n",
     "\n",
-    "~~~ {.python}\n",
+    "~~~\n",
     "element = 'oxygen'\n",
     "print 'first three characters:', element[0:3]\n",
     "print 'last three characters:', element[3:6]\n",
     "~~~\n",
     "\n",
-    "~~~ {.output}\n",
+    "~~~\n",
     "first three characters: oxy\n",
     "last three characters: gen\n",
     "~~~\n",

02-loops.ipynb

@@ -99,7 +99,7 @@
     "to repeat an operation---in this case, printing---once for each thing in a collection.\n",
     "The general form of a loop is:\n",
     "\n",
-    "~~~ {.python}\n",
+    "~~~\n",
     "for variable in collection:\n",
     "    do things with variable\n",
     "~~~\n",
@@ -200,7 +200,7 @@
     " Using `range`,\n",
     " write a loop that uses `range` to print the first 3 natural numbers:\n",
     "\n",
-    " ~~~ {.python}\n",
+    " ~~~\n",
     " 1\n",
     " 2\n",
     " 3\n",
@@ -224,7 +224,7 @@
     "\n",
     " Exponentiation is built into Python:\n",
     "\n",
-    " ~~~ {.python}\n",
+    " ~~~\n",
     " print 5 ** 3\n",
     " 125\n",
     " ~~~"

03-lists.ipynb

@@ -195,12 +195,12 @@
     "\n",
     "Use a for-loop to convert the string \"hello\" into a list of letters:\n",
     "\n",
-    "~~~ {.python}\n",
+    "~~~\n",
     "[\"h\", \"e\", \"l\", \"l\", \"o\"]\n",
     "~~~\n",
     "Hint: You can create an empty list like this:\n",
     "\n",
-    "~~~ {.python}\n",
+    "~~~\n",
     "my_list = []\n",
     "~~~"
    ]

05-choices.ipynb

@@ -233,7 +233,7 @@
     "3.  C\n",
     "4.  B and C\n",
     "\n",
-    "~~~ {.python}\n",
+    "~~~\n",
     "if 4 > 5:\n",
     "   print 'A'\n",
     "elif 4 == 5:\n",
@@ -265,7 +265,7 @@
     "explain what the rule is for which values are considered true and which are considered false.\n",
     "(Note that if the body of a conditional is a single statement, we can write it on the same line as the `if`.)\n",
     "\n",
-    "~~~ {.python}\n",
+    "~~~\n",
     "if '': print 'empty string is true'\n",
     "if 'word': print 'word is true'\n",
     "if []: print 'empty list is true'\n",
@@ -314,13 +314,13 @@
     "Python (and most other languages in the C family) provides [in-place operators](reference.html#in-place-operator)\n",
     "that work like this:\n",
     "\n",
-    "~~~ {.python}\n",
+    "~~~\n",
     "x = 1  # original value\n",
     "x += 1 # add one to x, assigning result back to x\n",
     "x *= 3 # multiply x by 3\n",
     "print x\n",
     "~~~\n",
-    "~~~ {.output}\n",
+    "~~~\n",
     "6\n",
     "~~~\n",
     "\n",
@@ -346,7 +346,7 @@
     "\n",
     "Explain what the overall effect of this code is:\n",
     "\n",
-    "~~~ {.python}\n",
+    "~~~\n",
     "left = 'L'\n",
     "right = 'R'\n",
     "\n",
@@ -357,7 +357,7 @@
     "\n",
     "Compare it to:\n",
     "\n",
-    "~~~ {.python}\n",
+    "~~~\n",
     "left, right = right, left\n",
     "~~~\n",
     "\n",

06-functions.ipynb

@@ -853,7 +853,7 @@
     "and returns a new string that has the wrapper character at the beginning and end of the original.\n",
     "A call to your function should look like this:\n",
     "\n",
-    "~~~ {.python}\n",
+    "~~~\n",
     "print fence('name', '*')\n",
     "*name*\n",
     "~~~"
@@ -881,7 +881,7 @@
     "that returns a string made up of just the first and last characters of its input.\n",
     "A call to your function should look like this:\n",
     "\n",
-    "~~~ {.python}\n",
+    "~~~\n",
     "print outer('helium')\n",
     "hm\n",
     "~~~"
@@ -904,7 +904,7 @@
     "\n",
     "What does the following piece of code display when run - and why?\n",
     "\n",
-    "~~~ {.python}\n",
+    "~~~\n",
     "f = 0\n",
     "k = 0\n",
     "\n",