dictionary_title=[
{'label': 'Green', 'genre_ids': 878},
{'label': 'Pink', 'genre_ids': 16},
{'label': 'Orange', 'genre_ids': 28},
{'label': 'Yellow', 'genre_ids': 9648},
{'label': 'Red', 'genre_ids': 878},
{'label': 'Brown', 'genre_ids': 12},
{'label': 'Black', 'genre_ids': 28},
{'label': 'White', 'genre_ids': 14},
{'label': 'Blue', 'genre_ids': 28},
{'label': 'Light Blue', 'genre_ids': 10751},
{'label': 'Magenta', 'genre_ids': 28},
{'label': 'Gray', 'genre_ids': 28}]
 
res = [i for i, o in enumerate(dictionary_title) if o['genre_ids'] == 28]
print(res)

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