this is matter of translating ( )( )and ( to python code (in file test_diffusion_pde_exact_linear py)def rhs(ut) len( rhs zeros( + rhs[ dsdt(tfor in range( )rhs[ (beta/dx** )*( [ + * [iu[ - ] ( [ ]trhs[ (beta/dx** )*( * [ - *dx*dudx( * [ ] ( [ ]treturn rhs def u_exact(xt)return ( * )*( ldef dudx( )return ( * def ( )return u_exact( tdef dsdt( )return *(-ldef (xt)return *( -lnote that dudx(tis the function representing the parameter in ( also note that the rhs function relies on access to global variables betadxland xand global functions dsdtgand dudx we expect the solution to be correct regardless of and tso we can choose small and : test function with goes like def test_diffusion_exact_linear()global betadxlx needed in rhs beta linspace( ln+ dx [ [ zeros( + u_ zeros( + u_ [ ( u_ [ :u_exact( [ :] dt print dt ut ode_fe(rhsu_ dtt=