code: def isshape(x):
      if not isinstance(x, tuple) or len(x) != 2:
          return False
      m, n = x
      if isinstance(n, tuple):
          return False
      return isintlike(m) and isintlike(n)
  
imports: import cupy
  from cupy._core import core
label_desc: Use image node_id 4 for calling a global function with example usage: isshape(x) and returns: unknown, False, False