code: def convert_va(mpl_va):
      """Convert mpl vertical alignment word to equivalent HTML word.
  
      Text alignment specifiers from mpl differ very slightly from those used
      in HTML. See the VA_MAP for more details.
  
      Positional arguments:
      mpl_va -- vertical mpl text alignment spec.
  
      """
      if mpl_va in VA_MAP:
          return VA_MAP[mpl_va]
      else:
          return None
  
imports: import math
  import warnings
  import matplotlib.dates
  from matplotlib import __version__
label_desc: Use image node_id 9 for calling a global function with example usage: convert_va(mpl_va) and returns: VA_MAP, None