All Questions
17 questions
0
votes
2
answers
97
views
How can I implement the uncurry function on python?
I have function curry with arbitrary arity:
def curry_explicit(function, arity):
if arity == 0:
return function
def get_args(args):
if len(args) == arity:
return ...
3
votes
1
answer
146
views
What is the benefit of using curried/currying function in Functional programming?
If you consider inner_multiply as an initializer of multiply, shouldn't you make them loosely coupled and DI the initializer (or any other way) especially if you require multiple initializers? Or am I ...
- 845
0
votes
0
answers
84
views
Pass final positional argument in a curried function to the last parameter available
Given a simple curried function
import toolz
@toolz.curry
def mklist(x, y, z):
return [x, y, z]
obviously calling mklist(x=1, y=2)(z=3) works.
What I would like to be able to do is to call the ...
- 952
1
vote
0
answers
38
views
Use standard library or 3rd party to conviently uncurry Python functions
I am experimenting with Functional Programming in Python and I usually end up needing a way to uncurry functions.
I solve this issue by using:
from typing import Callable, TypeVar
T = TypeVar("T&...
- 493
0
votes
0
answers
70
views
currying with python and lambda functiom
Let's say I have an procedural code in python like this,
x = np.random.randint(0, 9, (4,4))
def foo(x):
y = np.rot90(x)
y = np.rot90(y)
return y
# This can be written as
y = rot90(rot90(x))
...
- 774
0
votes
3
answers
967
views
How to create a function that applies a function to the inputs of another function in Python?
I'm looking for a nice functional way to do the following:
def add(x, y):
return x + y
def neg(x):
return -x
def c(x, y):
# Apply neg to inputs for add
_x = neg(x)
_y = neg(y)
...
- 570
2
votes
1
answer
451
views
Python curried function with variable number of arguments
Given n, I'd like to make a function which takes in n elements and returns them as a list. One way to do this:
def g(n):
def f(*l):
assert len(l) == n
return l
return f
My problem: I'd ...
- 2,663
1
vote
2
answers
297
views
How to curry a function at a given argument position
Is it possible to curry a function at a user-defined n-th position? Functool's partial function can handle partial evaluation of multiple arguments that
from functools import partial
def f(x,y,z):
...
- 476
0
votes
1
answer
180
views
Can we use keyword arguments and curry until all arguments are received?
Can we use keyword arguments and curry a function until all arguments are received in any order?
For example I have this code:
def create_folder_transformer(folder):
return lambda predicate: ...
- 22k
10
votes
3
answers
4k
views
How do I uncurry a function in Python?
Recently, I have studied 'Programming language' using standard ML, and I've learned currying method(or something), so I applied it in Python.
The below is simple function and currying.
def range_new(...
- 1,036
1
vote
0
answers
72
views
Currying lambda functions in python [duplicate]
How can I curry lambda functions in Python. I am using Toolz library, but it provides currying functionality for normal functions only and not lambda functions
- 727
1
vote
1
answer
111
views
Create new column depending on other columns: DRY and go functional
First: Maybe this fits better in code review, but I think here are more pandas affine users. Feel free to move it if you think otherwise
It is often the case, that one wants to compute a new column ...
- 5,447
2
votes
2
answers
786
views
Function currying with Python fn module
I found this functional programming library fn and I found the following code for function currying
>>> from fn.func import curried
>>> @curried
... def sum5(a, b, c, d, e):
... ...
- 193
366
votes
10
answers
335k
views
How does functools partial do what it does?
I am not able to get my head on how the partial works in functools.
I have the following code from here:
>>> sum = lambda x, y : x + y
>>> sum(1, 2)
3
>>> incr = lambda y : ...
- 4,539
109
votes
7
answers
106k
views
How do I write a function that returns another function?
In Python, I'd like to write a function make_cylinder_volume(r) which returns another function. That returned function should be callable with a parameter h, and return the volume of a cylinder with ...
- 1,381