是否有类似Python中Clojure的线程宏的内容? [英] Is there something like the threading macro from Clojure in Python?

问题描述

在Clojure中，我可以执行以下操作:

In Clojure I can do something like this:

(-> path
      clojure.java.io/resource
      slurp
      read-string)

而不是这样做:

(read-string (slurp (clojure.java.io/resource path)))

这在Clojure术语中称为线程 ，有助于消除很多括号.

This is called threading in Clojure terminology and helps getting rid of a lot of parentheses.

在Python中，如果我尝试使用map，any或filter之类的功能结构，则必须将它们相互嵌套.在Python中是否有一种结构可以用来类似于Clojure中的线程(或管道)?

In Python if I try to use functional constructs like map, any, or filter I have to nest them to each other. Is there a construct in Python with which I can do something similar to threading (or piping) in Clojure?

我不是要寻找功能齐全的版本，因为Python中没有宏，我只想在使用Python进行函数式编程时消除很多括号.

I'm not looking for a fully featured version since there are no macros in Python, I just want to do away with a lot of parentheses when I'm doing functional programming in Python.

编辑:我最终使用了 toolz 支持pipe ing.

I ended up using toolz which supports pipeing.

推荐答案

这里是@deceze想法的简单实现(尽管，正如@Carcigenicate指出的那样，它充其量只是部分解决方案):

Here is a simple implementation of @deceze's idea (although, as @Carcigenicate points out, it is at best a partial solution):

import functools
def apply(x,f): return f(x)
def thread(*args):
    return functools.reduce(apply,args)

例如:

def f(x): return 2*x+1
def g(x): return x**2
thread(5,f,g) #evaluates to 121

这篇关于是否有类似Python中Clojure的线程宏的内容?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！