Weichen-16小時的自由人 Comments

I'm encountering the same problem. I'm using modular playground. The version of mojo kernel should be v0.4.0 at the time.
According to Argument mutability and ownership I modified the function from the example in the docs.
My modified example:

fn add_owned(owned x: Int, owned y: Int) -> Int:
    x += 10
    y += 20
    return x + y

fn add_owned(owned x: Int, owned y: Int) -> Int:
    x += 10
    y += 20
    return x + y

Situation 1: a and b are declared as var

fn main_1():
    var a: Int = 100
    var b: Int = 200
    print("a: ", a, "b: ", b)
    let c = add_owned(a, b)
    print("c: ", c)
    print("a: ", a, "b: ", b)
   
main_1()

fn main_1():
    var a: Int = 100
    var b: Int = 200
    print("a: ", a, "b: ", b)
    let c = add_owned(a, b)
    print("c: ", c)
    print("a: ", a, "b: ", b)
   
main_1()

The result:

a:  100 b:  200
c:  330
a:  100 b:  200

a:  100 b:  200
c:  330
a:  100 b:  200

It works.
Situation 2 a and b are declared as let

fn main_2():
    let a: Int = 100
    let b: Int = 200
    print("a: ", a, "b: ", b)
    let c = add_owned(a, b)
    print("c: ", c)
    print("a: ", a, "b: ", b)
   
main_2()

fn main_2():
    let a: Int = 100
    let b: Int = 200
    print("a: ", a, "b: ", b)
    let c = add_owned(a, b)
    print("c: ", c)
    print("a: ", a, "b: ", b)
   
main_2()

The result:

expression failed to parse (no further compiler diagnostics)

expression failed to parse (no further compiler diagnostics)

It looks like Mojo didn't make copies of a and b separately.

32 replies

MModular

•Created by Elaid Tebabkha on 9/29/2023 in #questions

Can't find libpython

https://github.com/modularml/mojo/issues/551 This post also helps me a lot.

29 replies

MModular

•Created by Elaid Tebabkha on 9/29/2023 in #questions

Can't find libpython

I encountered the same problem. I followed you instructions, then the problem got solved. The only different part is that my libpython is under /usr/lib/x86_64-linux-gnu/ instead of /usr/lib I'm using WSL2. I guess that's why my libpython is under different location. Thank you, Jack.

29 replies

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