numeric.py 文件源码

def _validate_axis(axis, ndim, argname):
    try:
        axis = [operator.index(axis)]
    except TypeError:
        axis = list(axis)
    axis = [a + ndim if a < 0 else a for a in axis]
    if not builtins.all(0 <= a < ndim for a in axis):
        raise ValueError('invalid axis for this array in `%s` argument' %
                         argname)
    if len(set(axis)) != len(axis):
        raise ValueError('repeated axis in `%s` argument' % argname)
    return axis