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Course Description
In this Python Toolbox course, you'll continue to build more advanced Python 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 professionals and developers 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.The videos contain live transcripts you can reveal by clicking "Show transcript" at the bottom left of the videos.
The course glossary can be found on the right in the resources section.
To obtain CPE credits, you need to complete the course and reach a score of 70% on the qualified assessment. You can navigate to the assessment by clicking on the CPE credits callout on the right.
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Start Course for FreeWhat you'll learn
- Assess methods for loading and processing large or streaming datasets using pandas chunksize and custom generator functions
- Define the sequential steps required to aggregate data extracted from iterators, comprehensions, or generators into meaningful summary statistics
- Differentiate scenarios in which list comprehensions, generator expressions, or iterator-based chunk processing provide optimal memory efficiency
- Identify the characteristics and behaviors of Python iterables and iterators within the for-loop execution model
- Recognize the correct syntax and resulting structures of list comprehensions, dictionary comprehensions, and generator expressions
Prerequisites
Curriculum
Course outline
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.
- Introduction to iterators50 XP
- Iterators vs. Iterables50 XP
- Iterating over iterables (1)100 XP
- Iterating over iterables (2)100 XP
- Iterators as function arguments100 XP
- Playing with iterators50 XP
- Using enumerate100 XP
- Using zip100 XP
- Using * and zip to 'unzip'100 XP
- Using iterators to load large files into memory50 XP
- Processing large amounts of Twitter data100 XP
- Extracting information for large amounts of Twitter data100 XP
- Congratulations!50 XP
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 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.
3
Bringing it all together!
This chapter will allow you to apply your newly acquired skills toward wrangling and extracting meaningful information from a real-world dataset—the World Bank's World Development Indicators. You'll have the chance to write your own functions and list comprehensions as you work with iterators and generators to solidify your Python chops.
Python Toolbox
Course
Complete
