What a Python KeyError Usually Means

Python’s KeyError exception is a common exception encountered by beginners. Knowing why a KeyError can be raised and some solutions to prevent it from stopping your program are essential steps to improving as a Python programmer.

By the end of this course, you’ll know:

  • What a Python KeyError usually means
  • Where else you might see a KeyError in the standard library
  • How to handle a KeyError when you see it
  • When to raise a Python KeyError in your code

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Sample Code (.zip)

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Course Slides (.pdf)

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