def empty_like(prototype, dtype=None, order='K', subok=True, shape=None):
'''
empty_like(prototype, dtype=None, order='K', subok=True, shape=None)
Return a new var with the same shape and type as a given var.
Parameters
----------
prototype : var_like
The shape and data-type of prototype define these same
attributes of the returned array.
dtype : data-type, optional
Overrides the data type of the result.
order : {'C', 'F', 'A', or 'K'}, optional
Compatible with numpy.
subok : bool, optional.
Compatible with numpy.
shape : int or sequence of ints, optional.
Overrides the shape of the result.
Returns
-------
out : var
Var of uninitialized (arbitrary) data with the same shape
and type as prototype.
Example:
-------
>>> a = ([1,2,3], [4,5,6])
>>> np.empty_like(a)
'''
__order_assert(order)
dst_dtype, dst_shape = __array_like_type(prototype, dtype, order, shape)
return _F.placeholder(dst_shape, prototype.data_format, dst_dtype)
def empty(shape, dtype=float32, order='C'):
'''
empty(shape, dtype=float32)
Return a new var of given shape and type, without initializing entries.
Parameters
----------
shape : int or tuple of int
Shape of the empty var, e.g., (2, 3) or 2.
dtype : data-type, optional
Desired output data-type for the array, e.g, np.int8.
Default is np.float32.
order : {'C', 'F', 'A', or 'K'}, optional
Compatible with numpy.
Returns
-------
out : var
Var of uninitialized (arbitrary) data of the given shape,
dtype, and order. Object arrays will be initialized to None.
Example:
-------
>>> np.empty([2, 2])
'''
__order_assert(order)
return _F.placeholder(shape, _F.NCHW, dtype)
def empty_like(prototype, dtype=None, order='K', subok=True, shape=None):
__order_assert(order)
dst_dtype, dst_shape = __array_like_type(prototype, dtype, order, shape)
return _F.placeholder(dst_shape, prototype.data_format, dst_dtype)
def empty(shape, dtype=float32, order='C'):
__order_assert(order)
return _F.placeholder(shape, _F.NCHW, dtype)
def int(value):
res = F.placeholder([], F.NCHW, F.int)
res.write([value])
res.fix(F.Const)
return res