util.py 文件源码

def _exp_single(x):
    """Sanitized exponential function.
    Since this method internally calls np.exp and carries
    the (very likely) possibility to overflow, the method
    suppresses all warnings.

    #XXX: at some point we might want to let ``suppress_warnings``
    # specify exactly which types of warnings it should filter.

    Parameters
    ----------

    x : float, int
        The number to exp


    Returns
    -------

    val : float
        the exp of x
    """
    val = np.minimum(__max_exp__, np.exp(x))
    return val