def set_epsilon(epsilon):
global EPSILON, EPSILON2<EOL>EPSILON = float(epsilon)<EOL>EPSILON2 = EPSILON ** <NUM_LIT:2><EOL>
Set the global absolute error value and rounding limit for approximate
    floating point comparison operations. This value is accessible via the
    :attr:`planar.EPSILON` global variable.

    The default value of ``0.00001`` is suitable for values
    that are in the "countable range". You may need a larger
    epsilon when using large absolute values, and a smaller value
    for very small values close to zero. Otherwise approximate
    comparison operations will not behave as expected.