24 lines
556 B
Markdown
24 lines
556 B
Markdown
---
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title: compose
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tags: function,advanced
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---
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Performs right-to-left function composition.
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- Use `functools.reduce()` to perform right-to-left function composition.
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- The last (rightmost) function can accept one or more arguments; the remaining functions must be unary.
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```py
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from functools import reduce
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def compose(*fns):
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return reduce(lambda f, g: lambda *args: f(g(*args)), fns)
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```
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```py
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add5 = lambda x: x + 5
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multiply = lambda x, y: x * y
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multiply_and_add_5 = compose(add5, multiply)
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multiply_and_add_5(5, 2) # 15
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```
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