Python Command Line Tools by Noah Gift & Alfredo Deza

Author:Noah Gift & Alfredo Deza [Noah Gift]
Language: eng
Format: epub
Publisher: Pragmatic AI Solutions
Published: 2020-05-26T16:00:00+00:00

Item 1 total: 30 size: 23MB path: /var/lib severity: High issues: - issue-17 - issue-29

The output now looks a bit like structured YAML. It doesn’t matter, because after taking a second look, it seemed I could do better. What if I could give visual cues that informed without using any more space? This is what coloring can do for you: red can indicate an error, while blue can be informational or for low-priority items. Using a red color for Item 1 would implicitly describe this item as high severity, allowing the removal of severity: High as it would be redundant.

Next, command-line applications tend to like configuration files to implement human-readable defaults, or to avoid too many flags and values in the execution, simplifying working with a tool. Although there is no specific handler for configuration files, in this chapter, we also cover how to integrate config files into Click command-line tools. Finally, sub-commands and other friendly terminal-based interfaces complete the circle of powerful extras to enhance a tool that needs to grow in complexity. In chapter 1, I briefly covered sub-commands to explain how terrible sub-commands are implemented in Python’s standard library (with argparse primarily), which is an excellent introduction. Let’s go into more detail in this chapter.

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