code: def tree_sph(polar, azimuthal, n, standardization, symbolic=False):
      
      cos = numpy.vectorize(sympy.cos) if symbolic else numpy.cos
  
      # Conventions from
      # <https://en.wikipedia.org/wiki/Spherical_harmonics#Orthogonality_and_normalization>.
      config = {
          "acoustic": ("complex spherical", False),
          "quantum mechanic": ("complex spherical", True),
          "geodetic": ("complex spherical 1", False),
          "schmidt": ("schmidt", False),
      }
  
      standard, cs_phase = config[standardization]
  
      return tree_alp(
          cos(polar),
          n,
          phi=azimuthal,
          standardization=standard,
          with_condon_shortley_phase=cs_phase,
          symbolic=symbolic,
      )
docs: Evaluate all spherical harmonics of degree at most `n` at angles `polar`,
      `azimuthal`.