code: def make_dummy(name):
      """Make dummy variable of given name
  
      Parameters
      ----------
      name : str
          name of dummy variable
  
      Returns
      -------
      dum : `Dummy` instance
  
      Notes
      -----
      The interface to Dummy changed between 0.6.7 and 0.7.0, and we used this
      function to keep compatibility. Now we depend on sympy 0.7.0 and this
      function is obsolete.
      """
      return Dummy(name)
  
imports: import itertools
  import warnings
  from string import ascii_letters, digits
  import numpy
  import sympy
  from scipy.linalg import pinv
  from sympy import Dummy, default_sort_key
  from sympy.utilities.lambdify import implemented_function, lambdify
  from nipy.algorithms.utils.matrices import full_rank, matrix_rank
  from nipy.utils import VisibleDeprecationWarning, _NoValue
label_desc: Use image node_id 2 for calling a global function with example usage: make_dummy(name) and returns: Dummy