class_docstr: Device for CPU (NumPy) backend
class_docstr_tok: ["Device","for","CPU","(","NumPy",")","backend"]
code: def from_array(array):
      if isinstance(array, numpy.ndarray):
          return CpuDevice()
      return None
  
file_path: chainer/chainer/backends/_cpu.py
imports: import numpy
  from chainer import _backend
  import chainer.backends
  import chainerx
label_desc: Use image node_id 1 for calling the CpuDevice obj's underlying member method code with example usage: obj.from_array(array) and returns: None, CpuDevice