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Python Data Science Toolbox (Part 2)

Continue to build your modern Data Science skills by learning about iterators and list comprehensions.

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4 Hours12 Videos46 Exercises206,262 Learners3800 XPData Scientist TrackPython Fundamentals TrackPython Programmer Track

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Course Description

In this second Python Data Science Toolbox course, you'll continue to build your Python data science skills. First, you'll learn about iterators, objects you have already encountered in the context of for loops. You'll then learn about list comprehensions, which are extremely handy tools for all data scientists working in Python. You'll end the course by working through a case study in which you'll apply all the techniques you learned in both parts of this course.

  1. 1

    Using iterators in PythonLand


    You'll learn all about iterators and iterables, which you have already worked with when writing for loops. You'll learn some handy functions that will allow you to effectively work with iterators. And you’ll finish the chapter with a use case that is pertinent to the world of data science and dealing with large amounts of data—in this case, data from Twitter that you will load in chunks using iterators.

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    Introduction to iterators
    50 xp
    Iterators vs. Iterables
    50 xp
    Iterating over iterables (1)
    100 xp
    Iterating over iterables (2)
    100 xp
    Iterators as function arguments
    100 xp
    Playing with iterators
    50 xp
    Using enumerate
    100 xp
    Using zip
    100 xp
    Using * and zip to 'unzip'
    100 xp
    Using iterators to load large files into memory
    50 xp
    Processing large amounts of Twitter data
    100 xp
    Extracting information for large amounts of Twitter data
    100 xp
    50 xp
  2. 2

    List comprehensions and generators

    In this chapter, you'll build on your knowledge of iterators and be introduced to list comprehensions, which allow you to create complicated lists—and lists of lists—in one line of code! List comprehensions can dramatically simplify your code and make it more efficient, and will become a vital part of your Python data science toolbox. You'll then learn about generators, which are extremely helpful when working with large sequences of data that you may not want to store in memory, but instead generate on the fly.

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In the following tracks

Data Scientist Python FundamentalsPython Programmer


fgcastroFrancisco CastroyashasYashas Roy
Hugo Bowne-Anderson Headshot

Hugo Bowne-Anderson

Data Scientist at DataCamp

Hugo is a data scientist, educator, writer and podcaster at DataCamp. His main interests are promoting data & AI literacy, helping to spread data skills through organizations and society and doing amateur stand up comedy in NYC. If you want to know what he likes to talk about, definitely check out DataFramed, the DataCamp podcast, which he hosts and produces:
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I've used other sites—Coursera, Udacity, things like that—but DataCamp's been the one that I've stuck with.

Devon Edwards Joseph
Lloyds Banking Group

DataCamp is the top resource I recommend for learning data science.

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Harvard Business School

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Decision Science Analytics, USAA