SymPy: Replace a symbol inside a matrix

Question

I have a matrix that contains symbols:

t = sympy.symbols("t")
A = sympy.Matrix([[np.exp(t),1,-1)], [0,t,0], [0,t+1,0]])

I want to replace all the symbols "t" with a number.

Thank you in advance.

Answer 1

A = sympy.Matrix([[sympy.exp(t),1,-1], [0,t,0], [0,t+1,0]]) # fixing your expression
print(A.subs(t, 5))

Which gives

Matrix([
[exp(5), 1, -1],
[     0, 5,  0],
[     0, 6,  0]])