human
Solve the following python programming problem given the following code:
def convert_commit(repo_key, commit, porcelain = False) : 
    if porcelain : 
        def commit_url_for(sha) : 
            return url_for ('porcelain.get_commit', _external = True, repo_key = repo_key, branch_or_tag_or_sha = sha) 
else : 
        def commit_url_for(sha) : 
            return url_for ('plumbing.get_commit', _external = True, repo_key = repo_key, sha = sha) 
return { 
        'url' : url_for ('plumbing.get_commit', _external = True, repo_key = repo_key, sha = unicode (commit.id)), 
        'sha' : unicode (c.id), 
        'author' : _convert_signature (commit.author), 
        'committer' : _convert_signature (commit.committer), 
        'message' : commit.message.rstrip (), 
        'tree' : { 
            'sha' : unicode (commit.tree_id), 
            'url' : url_for ('plumbing.get_tree', _external = True, repo_key = repo_key, sha = unicode (commit.tree_id)), 
}, 
        'parents' : [{ 
            'sha' : unicode (c.id), 
            'url' : commit_url_for (unicode (c.id)), 
} for c in commit.parents], 
} 

    
    

    Fix the buggy line: 'sha' : unicode (c.id) ,
assistant
#Here is Python code to fix the buggy line: 'sha' : unicode (c.

'sha' : unicode (commit.id) ,