<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def get_image_uri(region_name, repo_name, repo_version=1):
 """Return algorithm image URI for the given AWS region, repository name, and repository version"""

    repo = '{}:{}'.format(repo_name, repo_version)
    return '{}/{}'.format(registry(region_name, repo_name), repo)