Implement __bool__ for diskcache.Cache to make it Truthy #350
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Python first checks __bool__ and then __len__ to determine whether an object is Truthy. Given the fact that an empty cache returns 0 for the length, it breaks checks that rely on `if cache` instead of `if cache is not None` to detect whether it's initialized. This commit fixes the issue.
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Python first checks bool and then len to determine whether an object is Truthy. Given the fact that an empty cache returns 0 for the length, it breaks checks that rely on
if cacheinstead ofif cache is not Noneto detect whether it's initialized. This commit fixes the issue.