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true false ipython notebook
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@ -97,7 +97,23 @@
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],
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],
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"language": "python",
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"language": "python",
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"metadata": {},
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"metadata": {},
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"outputs": []
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"outputs": [
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{
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"output_type": "stream",
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"stream": "stdout",
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"text": [
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"my_true_val == True: True\n",
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"my_true_val is True: True\n",
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"my_true_val == None: False\n",
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"my_true_val is None: False\n",
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"my_true_val == False: False\n",
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"my_true_val is False: False\n",
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"\"if my_true_val:\" is True\n",
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"\"if not my_true_val:\" is False\n"
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]
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}
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],
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"prompt_number": 83
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},
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},
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{
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{
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"cell_type": "markdown",
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"cell_type": "markdown",
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@ -264,7 +280,7 @@
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"metadata": {},
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"metadata": {},
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"source": [
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"source": [
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"## Empty List\n",
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"## Empty List\n",
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"It is generally not a good idea to use the `==` to check for empty lists. "
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"It is generally not a good idea to use the `==` to check for empty lists..."
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]
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]
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},
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},
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{
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{
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@ -378,7 +394,7 @@
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"## List comparison \n",
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"## List comparison \n",
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"List comparisons are a handy way to show the difference between `==` and `is`. \n",
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"List comparisons are a handy way to show the difference between `==` and `is`. \n",
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"While `==` is rather evaluating the equality of the value, `is` is checking if two objects are equal.\n",
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"While `==` is rather evaluating the equality of the value, `is` is checking if two objects are equal.\n",
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"The examples below show that we can assign a pointer to the same list object by using `=`, e.g., `list1 = list2`. If we want to make a copy of the list values, we have to make a little "
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"The examples below show that we can assign a pointer to the same list object by using `=`, e.g., `list1 = list2`. If we want to make a copy of the list values, we have to make a little tweak: `list1 = list2[:]`"
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]
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]
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},
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},
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{
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{
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@ -416,14 +432,6 @@
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}
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}
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],
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],
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"prompt_number": 82
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"prompt_number": 82
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},
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{
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"cell_type": "code",
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"collapsed": false,
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"input": [],
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"language": "python",
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"metadata": {},
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"outputs": []
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}
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}
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],
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],
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"metadata": {}
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"metadata": {}
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