Linear Expression Module ======================== This class implements linear expressions. .. py:method:: coefficient(self, symbol) Return the coefficient value of the given symbol. .. py:method:: coefficients(self) Return a list of the coefficients of an expression .. py:method:: constant(self) Return the constant value of an expression. .. py:method:: symbols(self) Return a list of symbols in an expression. .. py:method:: dimension(self) Return the number of vriables in an expression. .. py:method:: __sub__(self, other) Return the difference between two expressions. .. py:method:: subs(self, symbol, expression=None) Subsitute the given value into an expression and return the resulting expression. .. py:method:: fromsympy(self) Convert sympy object to an expression. .. py:method:: tosympy(self) Return an expression as a sympy object. .. py:class:: Dummy(Symbol) This class returns a dummy symbol to ensure that each no variables are repeated in an expression