code: def _get_sym_int(f, dt=0.02, t=50):
      # numerical integral of symbolic function
      return _get_num_int(lambdify_t(f), dt, t)
  
file_path: nipy/nipy/modalities/fmri/hrf.py
imports: from functools import partial
  import numpy
  import scipy.stats
  import sympy
  from sympy.utilities.lambdify import implemented_function
  from .utils import T, lambdify_t
label_desc: Use image node_id 3 for calling a global function with example usage: _get_sym_int(f, dt, t) and returns: _get_num_int