docs: def load_zip_data(zipname, f_sino_real, f_sino_imag,
                    f_angles=None, f_phantom=None, f_info=None):
      """Load example sinogram data from a .zip file"""
      ret = []
      with zipfile.ZipFile(str(zipname)) as arc:
          sino_real = np.loadtxt(arc.open(f_sino_real))
          sino_imag = np.loadtxt(arc.open(f_sino_imag))
          sino = sino_real + 1j * sino_imag
          ret.append(sino)
          if f_angles:
              angles = np.loadtxt(arc.open(f_angles))
              ret.append(angles)
          if f_phantom:
              phantom = np.loadtxt(arc.open(f_phantom))
              ret.append(phantom)
          if f_info:
              with arc.open(f_info) as info:
                  cfg = {}
                  for li in info.readlines():
                      li = li.decode()
                      if li.count("=") == 1:
                          key, val = li.split("=")
                          cfg[key.strip()] = float(val.strip())
              ret.append(cfg)
      return ret