code: def normalize_angle_halfcircle(theta):
      theta_norm = normalize_angle(theta)
      return theta_norm if theta_norm < np.pi else theta_norm - np.pi
  
file_path: pdftabextract/pdftabextract/geom.py
imports: import math
  import numpy
label_desc: Use image node_id 14 for calling a global function with example usage: normalize_angle_halfcircle(theta) and returns: unknown