code: def var(t1, t2, b1, b2, t):
      return (1.0 * t - t1) * (t2 - t) / (t2 - t1)
  
file_path: pythran/pythran/tests/cases/brownian.py
imports: import random
  from math import sqrt
label_desc: Use image node_id 6 for calling a global function with example usage: var(t1, t2, b1, b2, t) and returns: unknown