How to pass arguments as tuple to odeint?

Question

I wanted to use odeint of scipy with a function

def func(y,t,a=123,b=456)

then use it as

odeint(func,y0,t)

If I want to change the values a and b using args

odeint(func,y0,t,args=(a=1,b=2))

It complains that arguments are not tuple. It may be a very elementary question, how can I pass keyword arguments as a tuple?

odeint(func,y0,t,args=...?)

Answer 1

You just need to remove the assignments to make a legit tuple:

odeint(func,y0,t,args=(123, 456))

There's another answer here with an example of calling odeint with arguments.