grad.py

a = 5
b = 6
y = a/b

h = 0.00001

def dy_da_f():
  a2 = a + h
  y2 = a2 / b
  dy_da = (y2 - y) / h
  print(f"{y}={a}/{b}, grad {dy_da=}")

def dy_db_f():
  b2 = b + h
  y2 = a / b2
  dy_db = (y2 - y) / h
  print(f"{y}={a}/{b}, grad {dy_db=}")

dy_da_f()
dy_db_f()