python_pipeline.py

# helper class
class C:
    def __init__(self, val):
        self.val = val
    def pipe(self, func):
        return C(func(self.val))
    def result(self):
        return self.val
    __getitem__ = pipe
    __call__ = result
    
# usage

# demo functions
def a(x): return x * 2

def b(x): return x + 1

def c(x): return x * x

# same as c(b(a(4)))
C(4).pipe(a).pipe(b).pipe(c).result()
# if you like operators
C(4)[a][b][c]()