code: def eye(N, M=-1, k=0, dtype_name="float"):
      M = N if M == -1 else M
      return np.eye(N, M=M, k=k, dtype=np.dtype(dtype_name))
  
file_path: ray/python/ray/experimental/array/remote/core.py
imports: import numpy
  import ray
label_desc: Use image node_id 4 for calling a global function with example usage: eye(N, M, k, dtype_name) and returns: np