DEPRECATED.
Return derivative of expression.
This function returns an expression or list of expression objects
corresponding to the derivative of the passed expression ‘expr’ with
respect to a variable ‘wrt’ or list of variables ‘wrt_list’
Deprecated since version 5.6.7: The differentiate function in pyomo.core.base.symbolic has been deprecated. Please use the differentiate function in pyomo.core.expr. (will be removed in (or after) 5.7)