Apart from chaining generators, you can write a simple helper to pipe general expressions.
def pipe(cur_val, *fns):
"""
Pipes `cur_val` through `fns`.
::
def sqr(x): return x * x
def negate(x): return -x
`pipe(5, sqr, negate)`
is the same as
::
negate(sqr(5))
"""
for fn in fns:
cur_val = fn(cur_val)
return cur_val
I find `pipe(5, sqr, negate)` neater than `negate(sqr(5))`, especially when the nesting is greater than 2.
This is inspired by clojure's threading macro -> and a re-factoring of @fogus's code snippet on stack overflow. He used reduce to implement the loop - though loops can be implemented with reduce, and that's how you generally do it in clojure et al., it isn't idiomatic Python.
Comments
Apart from chaining generators, you can write a simple helper to pipe general expressions.
I find `pipe(5, sqr, negate)` neater than `negate(sqr(5))`, especially when the nesting is greater than 2.This is inspired by clojure's threading macro -> and a re-factoring of @fogus's code snippet on stack overflow. He used reduce to implement the loop - though loops can be implemented with reduce, and that's how you generally do it in clojure et al., it isn't idiomatic Python.