I am looking for numerical packages (ideally Python) to solve second kind Volterra integral equations, such as
or Volterra-Fredholm integral equations
$$u(x,t)=g(t,x)+c\int_0^t\int_\Omega K(t,s,x,\xi)u(s,\xi) d\xi ds$$
Are there any callable functions in Python to solve such equations? if not, are there any standard algorithm to solve such equations?