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rasbtrasbt
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class fix
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‎.ipynb_checkpoints/not_so_obvious_python_stuff-checkpoint.ipynb‎

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{
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"metadata": {
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"name": "",
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"signature": "sha256:e20426bb66111696c7ec4f8d754946061e129b3e332a6cc2fd00331b9540d8c5"
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"signature": "sha256:a9475a6f1134f87066829ecff7dab70b1fab2b2cc8ae3ee110b3e719b9626c23"
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},
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"nbformat": 3,
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"nbformat_minor": 0,
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],
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"prompt_number": 2
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"So what actually happened above was that class `C` was looking in the parent class `A` for the method `.foo()` first (and found it)!"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"I received an email with a nice suggestion using a more nested example to illustrate Guido van Rossum's point a little bit better:"
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]
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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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"class A(object):\n",
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" def foo(self):\n",
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" print(\"class A\")\n",
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"\n",
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"class B(A):\n",
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" pass\n",
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"\n",
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"class C(A):\n",
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" def foo(self):\n",
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" print(\"class C\")\n",
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"\n",
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"class D(B,C):\n",
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" pass\n",
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"\n",
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"D().foo()"
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],
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"language": "python",
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"metadata": {},
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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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"class C\n"
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]
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}
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],
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"prompt_number": 3
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"Here, class `D` searches in `B` first, which in turn inherits from `A` (note that class `C` also inherits from `A`, but has its own `.foo()` method) so that we come up with the search order: `D, B, C, A`"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},

‎not_so_obvious_python_stuff.ipynb‎

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{
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"metadata": {
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"name": "",
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"signature": "sha256:a6418912c66fa2e2c0c8b76a1ba6cb0cb8d33c37c8fd64338d77898af4589286"
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"signature": "sha256:a9475a6f1134f87066829ecff7dab70b1fab2b2cc8ae3ee110b3e719b9626c23"
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},
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"nbformat": 3,
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"nbformat_minor": 0,
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"Here, class `D` searches in `B` first, which in turn inherits from `A` (note that class `C` also inherits from `A`, but has its own `.foo()` method) so that we come up with the search order: `D, B, A, C`"
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"Here, class `D` searches in `B` first, which in turn inherits from `A` (note that class `C` also inherits from `A`, but has its own `.foo()` method) so that we come up with the search order: `D, B, C, A`"
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]
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},
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{

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