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Automatic numbering increases costs
[/vc_column_text][vc_column_text pl=”0″ pr=”0″ pt=”0″ pb=”0″]This code insight counts one violation each a string contains empty format replacement fields.
bad
print “{} is {}”.format(“life”,”hard”)
good
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Why you should care
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If you are not numbering your replacement fields {} in your format string, Python auto-numbers them. For example, using “{} {}” is interpreted as {0} {1}. This is correct code, but is hard to read if you use a large number of parameters. If a format string is particularly long, it is difficult to tell which replacement fields relate to which argument of your format string. Especially if code is refactored, unnumbered replacement fields are often not in sync with the arguments of the format string.
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Business Impacts
It is recommended to avoid these in order to ensure the code is more readable and cost effective.
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CAST recommendations
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References
https://www.quantifiedcode.com/knowledge-base/maintainability/Explicitly%20number%20replacement%20fields%20in%20a%20format%20string/3aSZNLMu
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About CAST and Highlight’s Code Insights
Over the last 25 years, CAST has leveraged unique knowledge on software quality measurement by analyzing thousands of applications and billions of lines of code. Based on this experience and community standards on programming best practices, Highlight implements hundreds of code insights across 15+ technologies to calculate health factors of a software.
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