What does this package do? - Episode 2: Enhanced Dictionaries (defaultdict and Counter)

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In this episode, we take a look at python’s defaultdict function and Counter class in the collections library.

00:00 - Introduction
00:22 - Creating events
01:00 - Console session on defaultdict
02:51 - Categorizing events
05:02 - Debugging defaultdict
06:23 - Introduction to Counter
06:54 - Debug session on Counter
09:35 - Outro
  1. PyCharm, a JetBrains IDE
  2. pycharm
  3. python ide
  4. python
  5. collections
  6. programming
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Комментарии
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Thank you so much for doing this series, Naiful, and to JetBrains for sponsoring it! I consider myself a fairly advanced Python programmer, but there are so many packages I haven't spent enough time with. You crammed a lot of great tips, and even a fix for a common problem, in less than 10 minutes!

Emily_Entropy
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An easy way to remove zero and negative values from the counter is to use the unary + operator. In the case here to cleanup event_frequency, you can just say:
event_frequency = +event_frequency
This avoids having to iterate or create additional variables.

MajorMichael
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Super useful. Cleans up a bit of code that's been annoying me recently.
I wouldn't mind if the code was available.

madst