Even clearer: x = [for word in words: for letter in word: letter] This also has ... | Hacker News

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jules on July 9, 2014 | parent | context | favorite | on: Anti-Patterns in Python Programming

Even clearer:

    x = [for word in words: for letter in word: letter]

This also has the advantage of being readable left to right without encountering any unbound identifiers like all other constructs in Python.

hueving on July 10, 2014 [–]

As someone who spends a significant amount of time in python that is much harder to follow. There is an expectation for order in list comprehensions and what you wrote completely violates it.

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