Problem

I am currently facing the problem that creating a review request for only one reviewer (via string) leads to an error response from GitHub.

Test Code

pull_request = repo.create_pull(branch_base, branch_new, title=title)
pull_request.create_review_request(reviewer_name)

-> github.GithubException.GithubException: 422 {“message”: “Invalid request.\n\nFor ‘properties/reviewers’, \”reviewer_name\“ is not an array.”, 'documentation_url': “https://docs.github.com/rest/pulls/review-requests#request-reviewers-for-a-pull-request”, 'status': “422”}

Changed code

pull_request = repo.create_pull(branch_base, branch_new, title=title)
pull_request.create_review_request([reviewer_name])

-> works

Suggestion

Your pull_request.create_review_request API allows you to pass the reviewer as a string and as a list, so I assume this issue can be fixed by wrapping the string to a list when a string is passed.