def _split_str ( s , n ) : length = len ( s ) return [ s [ i : i + n ] for i in range ( 0 , length , n ) ]
python split string into n substrings
split string into list of strings by specified number .
def _split_str(s, n):
    """
    split string into list of strings by specified number.
    """
    length = len(s)
    return [s[i:i + n] for i in range(0, length, n)]