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Shambhu Shrestha
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contextlib notebook
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‎python/notebooks/.ipynb_checkpoints/Contextlib-checkpoint.ipynb‎

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{
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"cells": [
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{
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"cell_type": "code",
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"execution_count": 4,
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"metadata": {
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"collapsed": true
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},
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"outputs": [],
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"source": [
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"from contextlib import contextmanager, closing\n",
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"from pprint import pprint as pp\n",
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"\n",
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"class A:\n",
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" def __init__(self):\n",
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" self.actions = []\n",
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" \n",
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" def open(self):\n",
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" self.actions.append('open')\n",
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" \n",
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" def close(self):\n",
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" self.actions.append('close')\n",
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" \n",
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" def do(self, action):\n",
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" self.actions.append(action)\n",
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" \n",
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" \n",
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"@contextmanager\n",
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"def getA():\n",
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" a = A()\n",
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" yield a\n",
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" pp(a.actions)\n",
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" \n",
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"\n"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 8,
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"metadata": {
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"collapsed": false
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},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"['open', 'open', 'work', 'close']\n"
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]
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}
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],
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"source": [
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"with getA() as a:\n",
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" with closing(a):\n",
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" a.open()\n",
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" a.open()\n",
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" a.do('work')"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 11,
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"metadata": {
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"collapsed": false
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},
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"outputs": [
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{
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"data": {
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"text/plain": [
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"'f:[hello world\\n]'"
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]
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},
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"execution_count": 11,
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"metadata": {},
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"output_type": "execute_result"
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}
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],
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"source": [
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"import io\n",
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"from contextlib import redirect_stdout\n",
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"\n",
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"f = io.StringIO()\n",
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"with redirect_stdout(f):\n",
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" print('hello world')\n",
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"\n",
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"'f:[{}]'.format(f.getvalue())"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {
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"collapsed": true
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},
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"outputs": [],
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"source": []
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}
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],
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"metadata": {
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"kernelspec": {
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"display_name": "Python 3",
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"language": "python",
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"name": "python3"
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},
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"language_info": {
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"codemirror_mode": {
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"name": "ipython",
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"version": 3
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},
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"file_extension": ".py",
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"mimetype": "text/x-python",
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"name": "python",
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"nbconvert_exporter": "python",
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"pygments_lexer": "ipython3",
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"version": "3.6.0"
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}
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},
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"nbformat": 4,
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"nbformat_minor": 2
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}

‎python/notebooks/Contextlib.ipynb‎

Lines changed: 120 additions & 0 deletions
Original file line numberDiff line numberDiff line change
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{
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"cells": [
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{
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"cell_type": "code",
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"execution_count": 4,
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"metadata": {
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"collapsed": true
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},
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"outputs": [],
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"source": [
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"from contextlib import contextmanager, closing\n",
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"from pprint import pprint as pp\n",
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"\n",
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"class A:\n",
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" def __init__(self):\n",
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" self.actions = []\n",
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" \n",
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" def open(self):\n",
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" self.actions.append('open')\n",
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" \n",
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" def close(self):\n",
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" self.actions.append('close')\n",
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" \n",
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" def do(self, action):\n",
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" self.actions.append(action)\n",
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" \n",
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" \n",
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"@contextmanager\n",
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"def getA():\n",
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" a = A()\n",
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" yield a\n",
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" pp(a.actions)\n",
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" \n",
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"\n"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 8,
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"metadata": {
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"collapsed": false
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},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"['open', 'open', 'work', 'close']\n"
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]
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}
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],
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"source": [
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"with getA() as a:\n",
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" with closing(a):\n",
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" a.open()\n",
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" a.open()\n",
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" a.do('work')"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 11,
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"metadata": {
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"collapsed": false
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},
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"outputs": [
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{
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"data": {
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"text/plain": [
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"'f:[hello world\\n]'"
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]
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},
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"execution_count": 11,
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"metadata": {},
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"output_type": "execute_result"
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}
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],
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"source": [
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"import io\n",
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"from contextlib import redirect_stdout\n",
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"\n",
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"f = io.StringIO()\n",
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"with redirect_stdout(f):\n",
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" print('hello world')\n",
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"\n",
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"'f:[{}]'.format(f.getvalue())"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {
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"collapsed": true
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},
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"outputs": [],
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"source": []
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}
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],
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"metadata": {
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"kernelspec": {
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"display_name": "Python 3",
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"language": "python",
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"name": "python3"
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},
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"language_info": {
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"codemirror_mode": {
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"name": "ipython",
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"version": 3
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},
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"file_extension": ".py",
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"mimetype": "text/x-python",
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"name": "python",
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"nbconvert_exporter": "python",
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"pygments_lexer": "ipython3",
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"version": "3.6.0"
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}
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},
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"nbformat": 4,
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"nbformat_minor": 2
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}

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