def parse_production_company(movie):
    """
    Convert production companies to a dictionnary for dataframe.
    Keeping only 3 production companies.
    :param movie: movie dictionnary
    :return: well-formated dictionnary with production companies
    """   
    parsed_production_co = {}
    top_k = 3
    production_companies = movie['production_co'][:top_k]
    for k, company in enumerate(production_companies):
        if k < len(movie['production_co']):
            parsed_production_co['production_co_{}'.format(k+1)] = company
        else:
            parsed_production_co['production_co_{}'.format(k+1)] = None
    return parsed_production_co