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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _trim_zeros_complex(str_complexes, na_rep='NaN'):
 """ Separates the real and imaginary parts from the complex number, and executes the _trim_zeros_float method on each of those. """

    def separate_and_trim(str_complex, na_rep):
        num_arr = str_complex.split('+')
        return (_trim_zeros_float([num_arr[0]], na_rep) +
                ['+'] +
                _trim_zeros_float([num_arr[1][:-1]], na_rep) +
                ['j'])

    return [''.join(separate_and_trim(x, na_rep)) for x in str_complexes]