def add_article ( name ):
    """ Returns a string containing the correct indefinite article ('a' or 'an')
    prefixed to the specified string.
    """
    if 'aeiou' in name[:1].lower():
       return 'an ' + name

    return 'a ' + name
dataset/ETHPy150Open enthought/depsolver/depsolver/bundled/traitlets/_implementation.py/add_article/swapped operands of `in`