class_docstr: A custom class for the Aitoff-Hammer projection, an equal-area map
  projection.
  
  https://en.wikipedia.org/wiki/Hammer_projection
class_docstr_tok: ["A","custom","class","for","the","Aitoff-Hammer","projection",",","an","equal-area","map","projection",".","https",":","\/\/en.wikipedia.org\/wiki\/Hammer_projection"]
code: def __init__(self, *args, **kwargs):
      self._longitude_cap = np.pi / 2.0
      super().__init__(*args, **kwargs)
      self.set_aspect(0.5, adjustable="box", anchor="C")
      self.clear()
  
imports: import numpy
  import matplotlib
  from matplotlib.axes import Axes
  import matplotlib.axis
  from matplotlib.patches import Circle
  from matplotlib.path import Path
  from matplotlib.projections import register_projection
  import matplotlib.spines
  from matplotlib.ticker import FixedLocator, Formatter, NullLocator
  from matplotlib.transforms import Affine2D, BboxTransformTo, Transform
label_desc: Use image node_id 1 to create a new HammerAxes object from inherited base classes: GeoAxes with example: obj = HammerAxes()