Missing 1 required positional argument in python code

[edwinostby]

Several issues.
In line 4 you define a function with 2 arguments but in line 19 you call it with one. The function does not use the second argument, so eliminating that would help. However, in line 5 you make a call to a function called f that is not defined.

Thanks for the reply!

I am struggling to use Euler's method to solve this equation "f'(t) = 4 + 3 *f(t)". As in line 4, i tried to do this;

def derived_f(t, ft):
return(4 + 3 *ft)

And then back in line 19 add this:

derived_f(f[t])

into the call function making it look like this;

f[i + 1] = f[i] + derived_f(t[i]) + derived_f(f[t]) * h

But i am still getting the same error:

Error:
f[i + 1] = f[i] + derived_f(t[i]) + derived_f(f[t]) * h

TypeError: derived_f() missing 1 required positional argument: 'ft'

Really new at python so I might be missing something obvious here, but how should i add the argument 'ft' to remove the error in the code?

Thanks in advance!