Skip to content
Sourcery Sourcery

Str Prefix Suffix

Documentation Index

Fetch the complete documentation index at: https://docs.sourcery.ai/llms.txt

Use this file to discover all available pages before exploring further.

Sourcery refactoring id: str-prefix-suffix

Section titled “Sourcery refactoring id: str-prefix-suffix”

Description

Section titled “Description”

Replace explicit str prefix/suffix check with call to startswith/endswith.

Before

Section titled “Before”
name[:8] == "Sourcery"
name[-8:] == "Sourcery"

After

Section titled “After”
name.startswith("Sourcery")
name.endswith("Sourcery")

Explanation

Section titled “Explanation”

When we read code like name[:8] == 'Sourcery' it takes a moment to understand exactly what it is doing. Instead when we read name.startswith('Sourcery') or name.endswith('Sourcery') it is immediate clear what the intent of the code is. Additionally we don’t have to manually count the length of the prefix and check it is the same as the slice end; if we ever change the prefix we are less likely to make a mistake.