tf.convert_to_tensor

TensorFlow 1 version View source on GitHub

Converts the given value to a Tensor.

tf.convert_to_tensor(
    value, dtype=None, dtype_hint=None, name=None
)

This function converts Python objects of various types to Tensor objects. It accepts Tensor objects, numpy arrays, Python lists, and Python scalars. For example:

def my_func(arg):
  arg = tf.convert_to_tensor(arg, dtype=tf.float32)
  return arg
 
# The following calls are equivalent.
value_1 = my_func(tf.constant([[1.0, 2.0], [3.0, 4.0]]))
print(value_1)
tf.Tensor(
  [[1. 2.]
   [3. 4.]], shape=(2, 2), dtype=float32)
value_2 = my_func([[1.0, 2.0], [3.0, 4.0]])
print(value_2)
tf.Tensor(
  [[1. 2.]
   [3. 4.]], shape=(2, 2), dtype=float32)
value_3 = my_func(np.array([[1.0, 2.0], [3.0, 4.0]], dtype=np.float32))
print(value_3)
tf.Tensor(
  [[1. 2.]
   [3. 4.]], shape=(2, 2), dtype=float32)

This function can be useful when composing a new operation in Python (such as my_func in the example above). All standard Python op constructors apply this function to each of their Tensor-valued inputs, which allows those ops to accept numpy arrays, Python lists, and scalars in addition to Tensor objects.

value An object whose type has a registered Tensor conversion function.
dtype Optional element type for the returned tensor. If missing, the type is inferred from the type of value.
dtype_hint Optional element type for the returned tensor, used when dtype is None. In some cases, a caller may not have a dtype in mind when converting to a tensor, so dtype_hint can be used as a soft preference. If the conversion to dtype_hint is not possible, this argument has no effect.
name Optional name to use if a new Tensor is created.

A Tensor based on value.

TypeError If no conversion function is registered for value to dtype.
RuntimeError If a registered conversion function returns an invalid value.
ValueError If the value is a tensor not of given dtype in graph mode.