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MModular

•Created by ct on 9/28/2023 in #questions

How can I create a Python list to add and remove structs?

Thanks for the reply

9 replies

MModular

•Created by ct on 9/28/2023 in #questions

How can I create a Python list to add and remove structs?

I did read "https://docs.modular.com/mojo/programming-manual.html" a while ago and did not find how to use Python like list. There is an example of implementation of array but it is not dynamic.

9 replies

MModular

•Created by Larsis on 9/14/2023 in #questions

Stackoverflow?

mojolang

3 replies

MModular

•Created by ct on 9/13/2023 in #questions

newbie needs help with error messages

Ok. https://docs.modular.com/mojo/programming-manual.html#register_passable-struct-decorator Notice that __init__ does not need 'self'

20 replies

MModular

•Created by ct on 9/13/2023 in #questions

newbie needs help with error messages

I think the parens are necessary and should call the __init__ with "self" being provided

20 replies

MModular

•Created by ct on 9/13/2023 in #questions

newbie needs help with error messages

This is what I got now:

@register_passable("trivial")
struct Item:
    var name: StringLiteral
    var qty: Int

    fn __init__(inout self) -> Self:
        return Self {name: "Unnamed", qty: 0}


fn main():
    var item = Item()
    var ls = DynamicVector[Item]()
    ls.push_back(item)
    print(ls[0].name)
    print(ls[0].qty)

@register_passable("trivial")
struct Item:
    var name: StringLiteral
    var qty: Int

    fn __init__(inout self) -> Self:
        return Self {name: "Unnamed", qty: 0}


fn main():
    var item = Item()
    var ls = DynamicVector[Item]()
    ls.push_back(item)
    print(ls[0].name)
    print(ls[0].qty)

error:

error: invalid call to '__init__': callee expects 1 argument, but 0 were specified
    var item = Item()

error: invalid call to '__init__': callee expects 1 argument, but 0 were specified
    var item = Item()

20 replies

MModular

•Created by ct on 9/13/2023 in #questions

newbie needs help with error messages

does it download the 350MB or so or is it smart about it?

20 replies

MModular

•Created by ct on 9/13/2023 in #questions

newbie needs help with error messages

do you have a newer version?

20 replies

MModular

•Created by ct on 9/13/2023 in #questions

newbie needs help with error messages

mojo --version mojo 0.2.1 (64d14e85)

20 replies

MModular

•Created by ct on 9/13/2023 in #questions

newbie needs help with error messages

this is what I get

@register_passable("trivial")
struct Item:
    var name: StringLiteral
    var qty: Int

    fn __init__(inout self) -> Self:
        self.name = "Unnamed"
        self.qty = 0


fn main():
    var item: Item = Item()
    var ls = DynamicVector[Item]()
    ls.push_back(item)
    print(ls[0].name)
c@c:~/w/mojo-playground$ mojo hello.mojo 
hello.mojo:15:26: error: invalid call to '__init__': callee expects 1 argument, but 0 were specified
    var item: Item = Item()
                     ~~~~^~
hello.mojo:9:5: note: function declared here
    fn __init__(inout self) -> Self:
    ^
mojo: error: failed to parse the provided Mojo

@register_passable("trivial")
struct Item:
    var name: StringLiteral
    var qty: Int

    fn __init__(inout self) -> Self:
        self.name = "Unnamed"
        self.qty = 0


fn main():
    var item: Item = Item()
    var ls = DynamicVector[Item]()
    ls.push_back(item)
    print(ls[0].name)
c@c:~/w/mojo-playground$ mojo hello.mojo 
hello.mojo:15:26: error: invalid call to '__init__': callee expects 1 argument, but 0 were specified
    var item: Item = Item()
                     ~~~~^~
hello.mojo:9:5: note: function declared here
    fn __init__(inout self) -> Self:
    ^
mojo: error: failed to parse the provided Mojo

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