plyfile.py 文件源码

def make2d(array, cols=None, dtype=None):
    '''
    Make a 2D array from an array of arrays.  The `cols' and `dtype'
    arguments can be omitted if the array is not empty.

    '''
    if (cols is None or dtype is None) and not len(array):
        raise RuntimeError("cols and dtype must be specified for empty "
                           "array")

    if cols is None:
        cols = len(array[0])

    if dtype is None:
        dtype = array[0].dtype

    return _np.fromiter(array, [('_', dtype, (cols,))],
                        count=len(array))['_']