Writing Idiomatic Python 3 by Jeff Knupp

Author:Jeff Knupp [Knupp, Jeff]
Language: eng
Format: epub
Publisher: Jeff Knupp
Published: 2013-11-30T04:30:00+00:00

When setting a tuple equal to some ordered data, oftentimes not all of the data is actually needed. Instead of creating throwaway variables with confusing names, use the _ as a placeholder to tell the reader, “This data will be discarded.”

6.6.2.1 Harmful

(name, age, temp, temp2) = get_user_info(user) if age > 21: output = '{name} can drink!'.format(name=name) # "Wait, where are temp and temp2 being used?"

6.6.2.2 Idiomatic

(name, age, _, _) = get_user_info(user) if age > 21: output = '{name} can drink!'.format(name=name) # "Clearly, only name and age are interesting"

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