code: def one_time_step(f1, f2):
      nx, ny, ns = f1.shape
      floc = np.zeros(ns)
      mloc = np.zeros(ns)
  
      periodic_bc(f1)
      for i in range(1, nx - 1):
          for j in range(1, ny - 1):
              getf(f1, floc, i, j)
              f2m_loc(floc, mloc)
              relaxation_loc(mloc)
              m2f_loc(mloc, floc)
              setf(f2, floc, i, j)
      return f2
  
file_path: pythran/pythran/tests/cases/d2q9_nxnyns.py
imports: import numpy
label_desc: Use image node_id 7 for calling a global function with example usage: one_time_step(f1, f2) and returns: f2