Source code for helpers

def to_int_list(s):
    '''
    take a string like ``[0,1,2,3]``
    and return a list of integers
    '''
    s = str(s)

    try:
        return list(map(int,s.rstrip(']').lstrip('[').split(',')))
    except ValueError:
        return list(map(int,s.rstrip(']').lstrip('[').split()))

def write_file(fn,str):
    '''
    write string ``str`` to filename ``fn``
    '''
    fh = open(fn,'w')
    fh.write(str)
    fh.close()