from typing import Dict
from typing import Any


def github_num_positive_reactions(comment_object: Dict[str, Any]) -> int:
    """
    Returns the number of positive reactions in an issue comment.
    """
    num_positive_reactions = 0
    positive_emojis = {'+1', 'laugh', 'hooray', 'heart', 'rocket', 'eyes'}
    reactions = comment_object.get('reactions', {})
    for emoji in positive_emojis:
        num_positive_reactions += reactions.get(emoji, 0)
    return num_positive_reactions