fix: KeyError in format_data function

[joydeep049]

This pull request addresses a KeyError issue in the format_data function. The function was encountering a KeyError when attempting to access the package key in certain cases. To resolve this issue, a check has been added to ensure that the package key exists before attempting to access its contents. This modification ensures that the function can handle cases where the package key is missing or empty, preventing the KeyError.

Additionally, this change includes minor formatting improvements for better readability and consistency.

This fix has been thoroughly tested and ensures the reliable execution of the format_data function, enhancing its robustness.

Please review and merge at your earliest convenience. Thank you!

[codecov-commenter]

Codecov Report

Merging #3452 (171f7e1) into main (c0c9889) will decrease coverage by 0.51%.
The diff coverage is 50.00%.

@@            Coverage Diff             @@
##             main    #3452      +/-   ##
==========================================
- Coverage   78.56%   78.05%   -0.51%     
==========================================
  Files         758      758              
  Lines       11484    11487       +3     
  Branches     1342     1343       +1     
==========================================
- Hits         9022     8966      -56     
- Misses       2038     2096      +58     
- Partials      424      425       +1     

Flag	Coverage Δ
win-longtests	78.05% <50.00%> (-0.51%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
cve_bin_tool/data_sources/osv_source.py	57.91% <50.00%> (-26.49%)	⬇️

... and 5 files with indirect coverage changes

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[terriko]

Thanks for working on this!

I've got a couple of nitpicks for the linters; I've marked them as suggestions but I'm going to merge them now and let the linters run again.

[terriko]

I can't merge this while it's still failing black and flake8 checks, but this is close enough to ready that i'm going to mark it as approved for hacktoberfest in case you need the credit. Please fix the linter issues when you get a chance, or if they're too much let me know and I'll try to resolve them for you later in the week.

[joydeep049]

When I ran it locally on my machine it passed all the pre-commit hook tests. I'm stuck.

[terriko]

I'm going to see if I can fix the issues reported manually since they look pretty simple to do:

 cve_bin_tool/data_sources/osv_source.py:302:30: E261 at least two spaces before inline comment
cve_bin_tool/data_sources/osv_source.py:303:18: W291 trailing whitespace

I'll merge these and let the tests re-run.

[terriko]

black issues have been resolved manually by me, so this is ready to merge. Thank you and happy hacktoberfest!