Python store action/method in block/array

Question

I am beginner in python and I am trying to write something like this in objective-c. In Objective-C, each method can be stored in block and those can be called again later. I have tried to find online but I don't know keyword in python. Can I write like that in python or is there any similar flow ? How shall I do?

void (^successBlock)() = ^{
    NSLog(@"Test");
};

NSMutableArray *muArr = [NSMutableArray array];
[muArr addObject:successBlock];

for (void (^successBlock)() in muArr) {
    successBlock();
}

Kind of. But as long as I can store function and do it later in python, it shall be okay. — Khant Thu Linn, Apr 02 '17 at 06:24

score 3 · Accepted Answer · answered Apr 02 '17 at 06:25

3

Functions are first-class members of Python. There's no extra syntax required beyond function definition. Check out this example using just standard library functions and a lambda function (which is roughly analogous to a block).

functions = [round, int, str, lambda x: x + 2]

for fn in functions:
    print(fn(3.1415))
# 3
# 3
# 3.1415
# 5.141500000000001

answered Apr 02 '17 at 06:25

Arya McCarthy

8,554
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Yes. It help. I am checking out lambda function . Thanks thanks. – Khant Thu Linn Apr 02 '17 at 08:43

score 1 · Answer 2 · edited May 23 '17 at 11:54

1

Functions in Python are first class citizens and so can be stored in variables.

See Assigning a function to a variable

def successBlock():
    NSLog("Test")

muArr = [successBlock]

for sb in muArr: 
    sb()

edited May 23 '17 at 11:54

Community

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1

answered Apr 02 '17 at 06:31

user783836

3,099
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fixed up a couple of typos – user783836 Apr 02 '17 at 06:40

score -1 · Answer 3 · answered Apr 02 '17 at 06:21

-1

Try this code and it should work

void (^successblock)() = ^^{
    NSLog(@"Test");
};

NSMutableArray *mUArr = [NsMutableArray array];
[muArr addObject:successBlock];

for (void (^successBlock)() in muArr) {
    successBlock()
}

answered Apr 02 '17 at 06:21

T Joe

1

2

I'm pretty sure the OP is asking how to write the code in python. – Taku Apr 02 '17 at 06:32

Python store action/method in block/array

3 Answers3