parameters: (self, bshash, key='BASIS')
docstring: Set the hash for this atom
          * @param key Keyword from input file, basis, ri_basis, etc.
          * @param bshash hash string of one-atom BasisSet
docstring_summary: Set the hash for this atom
          * @param key Keyword from input file, basis, ri_basis, etc.
          * @param bshash hash string of one-atom BasisSet
docstring_tokens: Set the hash for this atom * @param key Keyword from input file basis ri_basis etc . * @param bshash hash string of one - atom BasisSet
function: def set_shell(self, bshash, key='BASIS'):
          """Set the hash for this atom
          * @param key Keyword from input file, basis, ri_basis, etc.
          * @param bshash hash string of one-atom BasisSet
  
          """
          self.PYshells[key] = bshash
function_tokens: def set_shell ( self , bshash , key = 'BASIS' ) : self . PYshells [ key ] = bshash