code: def execute(cls, ctx, op):
      (z,), device_id, xp = as_same_device(
          [ctx[c.key] for c in op.inputs],
          device=op.device,
          ret_extra=True,
      )
  
      with device(device_id):
          ctx[op.outputs[0].key] = xp.angle(z, deg=op.deg)
  
file_path: mars/mars/tensor/arithmetic/angle.py
imports: import numpy
  from ...None import opcodes
  from ...serialization.serializables import BoolField
  from ..array_utils import device, as_same_device
  from ..utils import infer_dtype
  from .core import TensorUnaryOp
  from .utils import arithmetic_operand
label_desc: Use image node_id 3 for calling the TensorAngle obj's underlying member method code with example usage: obj.execute(cls, ctx, op) without return types