code: def grad_gamma_logpdf_arg0(x, a):
      return (a - x - 1) / x
  
file_path: autograd/autograd/scipy/stats/gamma.py
imports: from __future__ import absolute_import
  import autograd.numpy
  import scipy.stats
  from autograd.extend import primitive, defvjp
  from autograd.numpy.numpy_vjps import unbroadcast_f
  from autograd.scipy.special import gamma, psi
label_desc: Use image node_id 1 for calling a global function with example usage: grad_gamma_logpdf_arg0(x, a) and returns: unknown