notebook.ipynb

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   "source": [
    "# 🐍 🐻 PyBerlin Meetup 3 🐻 🐍 - 2019-04-30\n",
    "\n",
    "## Coding Slam - 3 Picks from the Python Standard Library\n",
    "\n",
    "### Michael Belfrage - [github.com/mikez](https://github.com/mikez)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "![](./skip.png)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## 1. `functools.partial`\n",
    "\n",
    "### https://docs.python.org/3/library/functools.html?#functools.partial"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [],
   "source": [
    "from functools import partial"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [],
   "source": [
    "def distance(x, y):\n",
    "    return abs(x - y)\n",
    "\n",
    "def closest(x, iterable):\n",
    "    return min(iterable, key=partial(distance, x))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "values = [28, 95, 41, 93, 59, 70, 45]\n",
    "closest(55, values)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "![](./skip.png)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## 2. `re`\n",
    "\n",
    "### https://docs.python.org/3/library/re.html"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [],
   "source": [
    "import re"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Digits"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "pattern = re.compile(r'\\d')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "pattern.match('1')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "pattern.match('a')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "pattern.match('௫')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "pattern = re.compile(r'\\d', flags=re.DEBUG)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "scrolled": true
   },
   "outputs": [],
   "source": [
    "int('௫')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "pattern = re.compile(r'\\d', flags=re.ASCII)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Readability (or making links clickable)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# source: https://stackoverflow.com/a/6041965\n",
    "pattern = re.compile(r'(http|ftp|https)://([\\w_-]+(?:(?:\\.[\\w_-]+)+))([\\w.,@?^=%&:/~+#-]*[\\w@?^=%&/~+#-])?')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "pattern = re.compile(r'''\n",
    "\n",
    "    # protocol\n",
    "    (http|ftp|https)://\n",
    "\n",
    "    # hostname\n",
    "    (\n",
    "        [\\w_-]+\n",
    "        (?:\n",
    "            \\.[\\w_-]+\n",
    "        )+\n",
    "    )\n",
    "\n",
    "    # path and parameters\n",
    "    (\n",
    "        [\\w.,@?^=%&:/~+#-]*\n",
    "        [\\w@?^=%&/~+#-]\n",
    "    )?\n",
    "\n",
    "''', flags=re.VERBOSE)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "def make_link(match):\n",
    "    link = match.group(0)\n",
    "    return f'<a href=\"{link}\">{link}</a>'"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "text = 'Check out https://www.python.org or https://github.com/python.'\n",
    "\n",
    "pattern.sub(make_link, text)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "text = 'Check out https://en.wikipedia.org/wiki/Python_(programming_language).'\n",
    "\n",
    "pattern.sub(make_link, text)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## 3. `webbrowser`\n",
    "\n",
    "### https://docs.python.org/3.7/library/webbrowser.html"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "import webbrowser"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "webbrowser.open('https://twitter.com/mikez')"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "![](./skip.png)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Thanks!\n",
    "## [github.com/mikez](https://github.com/mikez)"
   ]
  }
 ],
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