parameters: (self)
docstring: Returns true if this expression is identically a constant.  If so,
          then the expression can be safely replaced with its evalf() value
          without any possible change in meaning.
docstring_summary: Returns true if this expression is identically a constant.  If so,
          then the expression can be safely replaced with its evalf() value
          without any possible change in meaning.
docstring_tokens: Returns true if this expression is identically a constant . If so then the expression can be safely replaced with its evalf () value without any possible change in meaning .
function: def isConstant(self):
          """Returns true if this expression is identically a constant.  If so,
          then the expression can be safely replaced with its evalf() value
          without any possible change in meaning.
          """
          raise NotImplementedError()
function_tokens: def isConstant ( self ) : raise NotImplementedError ( )