Python class

TensorValue

Library for the graph TensorValue class.

TensorValue

class max.graph.TensorValue(value: Value | Value | BufferValue | TensorValue | Shape | Dim | int | float | integer | floating | ndarray)

Bases: Value

Represents a value semantic tensor within a Graph. It provides various methods and properties to manipulate and query tensor attributes such as shape, data type (dtype), device placement (device), and more.

The following example demonstrates how to create and manipulate tensor values in a graph:

import numpy as np
from max.dtype import DType
from max.graph import Graph, ops

matrix = np.array([[1, 2], [3, 4]], dtype=np.float32)

# Create a Graph context to work with tensors
with Graph("tensor_demo") as graph:
    # Create a constant tensor from the matrix
    tensor = ops.constant(matrix, dtype=DType.float32)

    # Access tensor properties
    print(f"Shape: {tensor.shape}")  # Output: [2, 2]
    print(f"Data type: {tensor.dtype}")  # Output: DType.float32

    # Perform operations on the tensor
    transposed = tensor.T
    doubled = tensor * 2

    print(f"Original shape: {tensor.shape}")  # Output: [2, 2]
    print(f"Transposed shape: {transposed.shape}")  # Output: [2, 2]

import numpy as np
from max.dtype import DType
from max.graph import Graph, ops

matrix = np.array([[1, 2], [3, 4]], dtype=np.float32)

# Create a Graph context to work with tensors
with Graph("tensor_demo") as graph:
    # Create a constant tensor from the matrix
    tensor = ops.constant(matrix, dtype=DType.float32)

    # Access tensor properties
    print(f"Shape: {tensor.shape}")  # Output: [2, 2]
    print(f"Data type: {tensor.dtype}")  # Output: DType.float32

    # Perform operations on the tensor
    transposed = tensor.T
    doubled = tensor * 2

    print(f"Original shape: {tensor.shape}")  # Output: [2, 2]
    print(f"Transposed shape: {transposed.shape}")  # Output: [2, 2]

T

property T*: TensorValue*

Returns the transposed tensor. T is the shorthand notation for transposing. For more information, see transpose().

• Returns:

  A new TensorValue with swapped dimensions.

broadcast_to()

broadcast_to(shape: Iterable[int | str | Dim | integer]) → TensorValue

Broadcasts the tensor to a new shape.

The following example demonstrates how to broadcast a tensor to a larger shape:

import numpy as np
from max.dtype import DType
from max.graph import Graph, ops

# Create a 2x2 matrix
matrix = np.array([[1, 2], [3, 4]], dtype=np.float32)

# Create a Graph context to work with tensors
with Graph("broadcast_to_demo") as graph:
    # Create a constant tensor from the matrix
    tensor = ops.constant(matrix, dtype=DType.float32)

    # Broadcast tensor to a 3x2x2 tensor (add a new dimension of size 3)
    broadcasted_tensor = tensor.broadcast_to((3, 2, 2))

    print(f"Original shape: {tensor.shape}")  # Output: [2, 2]
    print(f"Broadcasted shape: {broadcasted_tensor.shape}")  # Output: [3, 2, 2]

import numpy as np
from max.dtype import DType
from max.graph import Graph, ops

# Create a 2x2 matrix
matrix = np.array([[1, 2], [3, 4]], dtype=np.float32)

# Create a Graph context to work with tensors
with Graph("broadcast_to_demo") as graph:
    # Create a constant tensor from the matrix
    tensor = ops.constant(matrix, dtype=DType.float32)

    # Broadcast tensor to a 3x2x2 tensor (add a new dimension of size 3)
    broadcasted_tensor = tensor.broadcast_to((3, 2, 2))

    print(f"Original shape: {tensor.shape}")  # Output: [2, 2]
    print(f"Broadcasted shape: {broadcasted_tensor.shape}")  # Output: [3, 2, 2]

• Parameters:

  shape – An iterable of integers or symbolic dimensions.

• Returns:

  A new TensorValue with the broadcasted shape.

cast()

cast(dtype: DType) → TensorValue

Casts a symbolic tensor to a different data type.

The following example demonstrates how to cast a tensor from one data type to another:

import numpy as np
from max.dtype import DType
from max.graph import Graph, ops

# Create a matrix with float32 values
matrix = np.array([[1, 2], [3, 4]], dtype=np.float32)

# Create a Graph context to work with tensors
with Graph("cast_demo") as graph:
    # Create a constant tensor from the matrix
    tensor = ops.constant(matrix, dtype=DType.float32)

    # Cast tensor to integer type
    casted_tensor = tensor.cast(DType.int32)

    print(f"Original dtype: {tensor.dtype}")  # Output: DType.float32
    print(f"Casted dtype: {casted_tensor.dtype}")  # Output: DType.int32

import numpy as np
from max.dtype import DType
from max.graph import Graph, ops

# Create a matrix with float32 values
matrix = np.array([[1, 2], [3, 4]], dtype=np.float32)

# Create a Graph context to work with tensors
with Graph("cast_demo") as graph:
    # Create a constant tensor from the matrix
    tensor = ops.constant(matrix, dtype=DType.float32)

    # Cast tensor to integer type
    casted_tensor = tensor.cast(DType.int32)

    print(f"Original dtype: {tensor.dtype}")  # Output: DType.float32
    print(f"Casted dtype: {casted_tensor.dtype}")  # Output: DType.int32

• Parameters:

  dtype – The target data type (e.g., DType.int32, DType.float64).

• Returns:

  A new TensorValue with the casted data type.

device

property device*: DeviceRef*

Returns the device of the TensorValue.

dtype

property dtype*: DType*

Returns the tensor data type.

The following example demonstrates how to access the data type of a tensor:

import numpy as np
from max.dtype import DType
from max.graph import Graph, ops

# Create a matrix with float32 values
matrix = np.array([[1, 2], [3, 4]], dtype=np.float32)

# Create a Graph context to work with tensors
with Graph("dtype_demo") as graph:
    # Create a constant tensor from the matrix
    tensor = ops.constant(matrix, dtype=DType.float32)

    # Access tensor data type
    print(f"Data type: {tensor.dtype}")  # Output: DType.float32

import numpy as np
from max.dtype import DType
from max.graph import Graph, ops

# Create a matrix with float32 values
matrix = np.array([[1, 2], [3, 4]], dtype=np.float32)

# Create a Graph context to work with tensors
with Graph("dtype_demo") as graph:
    # Create a constant tensor from the matrix
    tensor = ops.constant(matrix, dtype=DType.float32)

    # Access tensor data type
    print(f"Data type: {tensor.dtype}")  # Output: DType.float32

flatten()

flatten(start_dim: int = 0, end_dim: int = -1) → TensorValue

Flattens the specified dims of a symbolic tensor.

The number and order of the elements in the tensor is unchanged. All dimensions from start_dim to end_dim (inclusive) are merged into a single output dim.

The following example demonstrates how to flatten a multi-dimensional tensor:

import numpy as np
from max.dtype import DType
from max.graph import Graph, ops

# Create a 2x2 matrix
matrix = np.array([[1, 2], [3, 4]], dtype=np.float32)

# Create a Graph context to work with tensors
with Graph("flatten_demo") as graph:
    # Create a constant tensor from the matrix
    tensor = ops.constant(matrix, dtype=DType.float32)

    # Flatten the tensor to a 1D array
    flattened_tensor = tensor.flatten()

    print(f"Original shape: {tensor.shape}")  # Output: [2, 2]
    print(f"Flattened shape: {flattened_tensor.shape}")  # Output: [4]

import numpy as np
from max.dtype import DType
from max.graph import Graph, ops

# Create a 2x2 matrix
matrix = np.array([[1, 2], [3, 4]], dtype=np.float32)

# Create a Graph context to work with tensors
with Graph("flatten_demo") as graph:
    # Create a constant tensor from the matrix
    tensor = ops.constant(matrix, dtype=DType.float32)

    # Flatten the tensor to a 1D array
    flattened_tensor = tensor.flatten()

    print(f"Original shape: {tensor.shape}")  # Output: [2, 2]
    print(f"Flattened shape: {flattened_tensor.shape}")  # Output: [4]

• Parameters:

  • start_dim – The starting dimension to flatten. Defaults to 1.
  • end_dim – The ending dimension to flatten. Defaults to -1.

• Returns:

  A new TensorValue with the flattened dimensions.

permute()

permute(dims: list[int]) → TensorValue

Permutes the tensor’s dimensions based on provided indices.

• Parameters:

  dims – A list of integers specifying the new order of dimensions.

• Returns:

  A new TensorValue with permuted dimensions.

print()

print(label: str = 'debug_tensor')

Prints detailed information about the tensor.

• Parameters:

  label – A string label for the printed output. Defaults debug_tensor.

rank

property rank*: int*

Returns the rank (number of dims) of the buffer.

The following example demonstrates how to access the rank of a tensor:

import numpy as np
from max.dtype import DType
from max.graph import Graph, ops

# Create a 2x2 matrix (2-dimensional array)
matrix = np.array([[1, 2], [3, 4]], dtype=np.float32)

# Create a Graph context to work with tensors
with Graph("rank_demo") as graph:
    # Create a constant tensor from the matrix
    tensor = ops.constant(matrix, dtype=DType.float32)

    # Access tensor rank (number of dimensions)
    print(f"Rank: {tensor.rank}")  # Output: 2

import numpy as np
from max.dtype import DType
from max.graph import Graph, ops

# Create a 2x2 matrix (2-dimensional array)
matrix = np.array([[1, 2], [3, 4]], dtype=np.float32)

# Create a Graph context to work with tensors
with Graph("rank_demo") as graph:
    # Create a constant tensor from the matrix
    tensor = ops.constant(matrix, dtype=DType.float32)

    # Access tensor rank (number of dimensions)
    print(f"Rank: {tensor.rank}")  # Output: 2

rebind()

rebind(shape: Iterable[int | str | Dim | integer], message: str = '') → TensorValue

Rebinds the tensor to a new shape with error handling.

• Parameters:

  • shape – The new shape as an iterable of integers or symbolic dimensions.
  • message – (optional) A message for logging or debugging.

• Returns:

  A new TensorValue with the updated shape.

reshape()

reshape(shape: Iterable[int | str | Dim | integer]) → TensorValue

Creates a new tensor with the same data but reshaped.

The following example demonstrates how to reshape a tensor to change its dimensions:

import numpy as np
from max.dtype import DType
from max.graph import Graph, ops

# Create a 2x2 matrix
matrix = np.array([[1, 2], [3, 4]], dtype=np.float32)

# Create a Graph context to work with tensors
with Graph("reshape_demo") as graph:
    # Create a constant tensor from the matrix
    tensor = ops.constant(matrix, dtype=DType.float32)

    # Reshape tensor to a 1x4 matrix
    reshaped_tensor = tensor.reshape((1, 4))

    print(f"Original shape: {tensor.shape}")  # Output: [2, 2]
    print(f"Reshaped shape: {reshaped_tensor.shape}")  # Output: [1, 4]

import numpy as np
from max.dtype import DType
from max.graph import Graph, ops

# Create a 2x2 matrix
matrix = np.array([[1, 2], [3, 4]], dtype=np.float32)

# Create a Graph context to work with tensors
with Graph("reshape_demo") as graph:
    # Create a constant tensor from the matrix
    tensor = ops.constant(matrix, dtype=DType.float32)

    # Reshape tensor to a 1x4 matrix
    reshaped_tensor = tensor.reshape((1, 4))

    print(f"Original shape: {tensor.shape}")  # Output: [2, 2]
    print(f"Reshaped shape: {reshaped_tensor.shape}")  # Output: [1, 4]

• Parameters:

  shape – The new shape as an iterable of integers or symbolic dimensions.

• Returns:

  A new TensorValue with the reshaped dimensions.

shape

property shape*: Shape*

Returns the shape of the TensorValue.

The following example demonstrates how to access the shape of a tensor:

import numpy as np
from max.dtype import DType
from max.graph import Graph, ops

# Create a 2x2 matrix
matrix = np.array([[1, 2], [3, 4]], dtype=np.float32)

# Create a Graph context to work with tensors
with Graph("shape_demo") as graph:
    # Create a constant tensor from the matrix
    tensor = ops.constant(matrix, dtype=DType.float32)

    # Access tensor shape
    print(f"Shape: {tensor.shape}")  # Shape: [Dim(2), Dim(2)]

import numpy as np
from max.dtype import DType
from max.graph import Graph, ops

# Create a 2x2 matrix
matrix = np.array([[1, 2], [3, 4]], dtype=np.float32)

# Create a Graph context to work with tensors
with Graph("shape_demo") as graph:
    # Create a constant tensor from the matrix
    tensor = ops.constant(matrix, dtype=DType.float32)

    # Access tensor shape
    print(f"Shape: {tensor.shape}")  # Shape: [Dim(2), Dim(2)]

to()

to(device: DeviceRef) → TensorValue

Transfers the tensor to a specified device without mutation.

The following example demonstrates how to move a tensor from one device to another:

import numpy as np
from max.dtype import DType
from max.graph import Graph, ops, DeviceRef

# Create a 2x2 matrix
matrix = np.array([[1, 2], [3, 4]], dtype=np.float32)

with Graph("to_device_example") as graph:
    # Create a tensor on the default device
    tensor = ops.constant(matrix, dtype=DType.float32)

    # Move the tensor to a GPU device
    gpu_tensor = tensor.to(DeviceRef.GPU())

    print(f"Original device: {tensor.device}")  # Output depends on default device
    print(f"New device: {gpu_tensor.device}")  # Output: gpu:0

import numpy as np
from max.dtype import DType
from max.graph import Graph, ops, DeviceRef

# Create a 2x2 matrix
matrix = np.array([[1, 2], [3, 4]], dtype=np.float32)

with Graph("to_device_example") as graph:
    # Create a tensor on the default device
    tensor = ops.constant(matrix, dtype=DType.float32)

    # Move the tensor to a GPU device
    gpu_tensor = tensor.to(DeviceRef.GPU())

    print(f"Original device: {tensor.device}")  # Output depends on default device
    print(f"New device: {gpu_tensor.device}")  # Output: gpu:0

• Parameters:

  device – A DeviceRef object specifying the target device.

• Returns:

  A new TensorValue on the specified device.

transpose()

transpose(dim_1: int, dim_2: int) → TensorValue

Swaps two dimensions of the tensor.

The following example demonstrates how to transpose a tensor by swapping its dimensions:

import numpy as np
from max.dtype import DType
from max.graph import Graph, ops

# Create a 2x3 matrix
matrix = np.array([[1, 2, 3], [4, 5, 6]], dtype=np.float32)

with Graph("transpose_demo") as graph:
    tensor = ops.constant(matrix, dtype=DType.float32)

    # Transpose the tensor (swap dimensions 0 and 1)
    transposed_tensor = tensor.transpose(dim_1=0, dim_2=1)

    print(f"Original shape: {tensor.shape}")  # Output: [2, 3]
    print(f"Transposed shape: {transposed_tensor.shape}")  # Output: [3, 2]

import numpy as np
from max.dtype import DType
from max.graph import Graph, ops

# Create a 2x3 matrix
matrix = np.array([[1, 2, 3], [4, 5, 6]], dtype=np.float32)

with Graph("transpose_demo") as graph:
    tensor = ops.constant(matrix, dtype=DType.float32)

    # Transpose the tensor (swap dimensions 0 and 1)
    transposed_tensor = tensor.transpose(dim_1=0, dim_2=1)

    print(f"Original shape: {tensor.shape}")  # Output: [2, 3]
    print(f"Transposed shape: {transposed_tensor.shape}")  # Output: [3, 2]

• Parameters:

  • dim_1 – The first dimension to swap.
  • dim_2 – The second dimension to swap.

• Returns:

  A new TensorValue with swapped dimensions.

type

property type*: TensorType*

Returns the type of the TensorValue as a TensorType.

Was this page helpful?

Thank you! We'll create more content like this.

Thank you for helping us improve!

😔 What went wrong?

Some code doesn’t work

It includes inaccurate information

It's missing information I need

It was difficult to understand

Other

Submit