code: def factorial(n):
      return gamma(n + 1)
  
imports: from __future__ import division, print_function, absolute_import
  from scipy._lib.six import xrange
  from numpy import logical_and, asarray, pi, zeros_like, piecewise, array, arctan2, tan, zeros, arange, floor
  from numpy.core.umath import sqrt, exp, greater, less, cos, add, sin, less_equal, greater_equal
  from .spline import cspline2d, sepfir2d
  from scipy.special import comb, gamma
label_desc: Use image node_id 1 for calling a global function with example usage: factorial(n) and returns: gamma