code: def erf_inv(x: float) -> float:
      sgn = -1.0 if x < 0 else 1.0
      x = (1.0 - x) * (1 + x)
      if x == 0:
          return 0
      log = np.log(x)
      v = 2.0 / (np.pi * 0.147) + 0.5 * log
      v2 = 1.0 / 0.147 * log
      v3 = -v + np.sqrt(v * v - v2)
      x = sgn * np.sqrt(v3)
      return x
  
file_path: onnx/onnx/reference/ops/aionnxml/_common_classifier.py
imports: import numpy
label_desc: Use image node_id 5 for calling a global function with example usage: erf_inv(x) and returns: x, int