# Compose functions

Python, Function · Nov 2, 2020

Performs right-to-left function composition.

- Use
`functools.reduce()`

to perform right-to-left function composition. - The last (rightmost) function can accept one or more arguments; the remaining functions must be unary.

```
from functools import reduce
def compose(*fns):
return reduce(lambda f, g: lambda *args: f(g(*args)), fns)
```

```
add5 = lambda x: x + 5
multiply = lambda x, y: x * y
multiply_and_add_5 = compose(add5, multiply)
multiply_and_add_5(5, 2) # 15
```