✅ Put your name here
" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "# Day-04_Preclass_TimeSeries" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "## Goals for Preclass\n", "\n", "1. Date and Time tools in Python\n", "2. Creating a Time series\n", "3. Working with data that has time series\n", "\n", "**This assignment is due by 11:59 p.m. the day before class,** and should be uploaded into the \"Pre-class assignments\" dropbox folder for Day 3. Submission instructions can be found at the end of the notebook." ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "### Imports for the notebook" ] }, { "cell_type": "code", "execution_count": 46, "metadata": {}, "outputs": [], "source": [ "import datetime\n", "import pandas as pd" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "## Date and Time in Python\n", "\n", "We imported `datetime` above as that is the major module for time in Python. It can be a little confusing that the `datetime` module also contains a `datetime` class so that, expressions like `datetime.datetime` are used. We need to keep that straight.\n", "\n", "It's always good to see what's in the `datetime` class. Use the `dir()` function and list the contents (the variables, the methods and the hidden elements). Do that below please." ] }, { "cell_type": "code", "execution_count": null, "metadata": {}, "outputs": [], "source": [ "# show contents of datetime" ] }, { "cell_type": "code", "execution_count": 2, "metadata": {}, "outputs": [ { "data": { "text/plain": [ "['MAXYEAR',\n", " 'MINYEAR',\n", " '__builtins__',\n", " '__cached__',\n", " '__doc__',\n", " '__file__',\n", " '__loader__',\n", " '__name__',\n", " '__package__',\n", " '__spec__',\n", " 'date',\n", " 'datetime',\n", " 'datetime_CAPI',\n", " 'sys',\n", " 'time',\n", " 'timedelta',\n", " 'timezone',\n", " 'tzinfo']" ] }, "execution_count": 2, "metadata": {}, "output_type": "execute_result" } ], "source": [ "### ANSWER ###\n", "dir(datetime)" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "The major components of `datetime` are:\n", "\n", "* `date` – Allows us to manipulate dates independent of time (month, day, year).\n", "* `time` – Allows us to manipulate time independent of date (hour, minute, second, microsecond).\n", "* `timedelta` — A duration of time used for manipulating dates and measuring.\n", "* `tzinfo` — An abstract class for dealing with time zones.\n", "* `datetime` - A combination of the `date` and `time` class" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "For a lot of the work you need to do, the `datetime` object is the way to go. Like a `date` object, datetime assumes the current Gregorian calendar extended in both directions; like a `time` object, datetime assumes there are exactly 3600*24 seconds in every day.\n", "\n", "With that in mind, let's take a quick look at a `datetime` object. Please use the dir function to list its contents." ] }, { "cell_type": "code", "execution_count": 3, "metadata": {}, "outputs": [], "source": [ "# show contents of datetime" ] }, { "cell_type": "code", "execution_count": 4, "metadata": {}, "outputs": [ { "data": { "text/plain": [ "['__add__',\n", " '__class__',\n", " '__delattr__',\n", " '__dir__',\n", " '__doc__',\n", " '__eq__',\n", " '__format__',\n", " '__ge__',\n", " '__getattribute__',\n", " '__gt__',\n", " '__hash__',\n", " '__init__',\n", " '__init_subclass__',\n", " '__le__',\n", " '__lt__',\n", " '__ne__',\n", " '__new__',\n", " '__radd__',\n", " '__reduce__',\n", " '__reduce_ex__',\n", " '__repr__',\n", " '__rsub__',\n", " '__setattr__',\n", " '__sizeof__',\n", " '__str__',\n", " '__sub__',\n", " '__subclasshook__',\n", " 'astimezone',\n", " 'combine',\n", " 'ctime',\n", " 'date',\n", " 'day',\n", " 'dst',\n", " 'fold',\n", " 'fromisoformat',\n", " 'fromordinal',\n", " 'fromtimestamp',\n", " 'hour',\n", " 'isocalendar',\n", " 'isoformat',\n", " 'isoweekday',\n", " 'max',\n", " 'microsecond',\n", " 'min',\n", " 'minute',\n", " 'month',\n", " 'now',\n", " 'replace',\n", " 'resolution',\n", " 'second',\n", " 'strftime',\n", " 'strptime',\n", " 'time',\n", " 'timestamp',\n", " 'timetuple',\n", " 'timetz',\n", " 'today',\n", " 'toordinal',\n", " 'tzinfo',\n", " 'tzname',\n", " 'utcfromtimestamp',\n", " 'utcnow',\n", " 'utcoffset',\n", " 'utctimetuple',\n", " 'weekday',\n", " 'year']" ] }, "execution_count": 4, "metadata": {}, "output_type": "execute_result" } ], "source": [ "### ANSWER ###\n", "dir(datetime.datetime)" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "More stuff. The most straight forward thing to do is see what time it is `now`" ] }, { "cell_type": "code", "execution_count": 9, "metadata": {}, "outputs": [ { "name": "stdout", "output_type": "stream", "text": [ "2020-07-23 14:14:19.716510\n", "