capt_falamer Comments - Answer Overflow

capt_falamer

•Created by jmky on 10/7/2024 in #questions

Is there a disdain for Rust from the Mojo team?

this kind of step by step introduction from simple to advanced features would be great to add to the mojo documentation. it would be especially helpful to the python crowd or even people new to programming

23 replies

MModular

•Created by taalhaataahir01022001 on 10/8/2024 in #questions

Reshape MAX API OP giving error

I'm not getting any errors when running this (same as above but with the import statements):

from max.graph import Graph, ops
from max.graph.type import TensorType, Dim, Type

fn main() raises:
    dim1 = Dim(2)
    dim2 = Dim(2)
    x = List[Dim] ()
    x.append(dim1)
    x.append(dim2)

    var graph0 = Graph(in_types=List[Type](TensorType(DType.float32, 1, 2, 2)))
    var r = ops.reshape(graph0[0], x)

from max.graph import Graph, ops
from max.graph.type import TensorType, Dim, Type

fn main() raises:
    dim1 = Dim(2)
    dim2 = Dim(2)
    x = List[Dim] ()
    x.append(dim1)
    x.append(dim2)

    var graph0 = Graph(in_types=List[Type](TensorType(DType.float32, 1, 2, 2)))
    var r = ops.reshape(graph0[0], x)

what version of mojo/max are you running?

4 replies

MModular

•Created by banananas on 9/28/2024 in #questions

Calling methods from list indexes

then what I first responded was what you were looking for. Here's a fleshed out example to clarify what I was trying to communicate

from utils import Variant
alias ComponentList = Variant[BaseComponent1,BaseComponent2]
alias CptList = List[ComponentList]

struct Entity:
    var components: CptList

    fn __init__(inout self, components: CptList):
        self.components = components
    
    fn update(inout self):
        for i in range(len(self.components)):
            if self.components[i].isa[BaseComponent1]():
                self.components[i][BaseComponent1].update()
            elif self.components[i].isa[BaseComponent2]():
                self.components[i][BaseComponent2].update()
            #continue elif statements for each additional variant
            
    fn addCpt(inout self, value: ComponentList):
        self.components.append(value)


@value
struct BaseComponent1: # example
    fn __init__(inout self): print("hi!!!!!")

    fn update(inout self): print("update method1")
    fn render(inout self): pass

@value
struct BaseComponent2: # example
    fn __init__(inout self): print("hi2!!!!!")

    fn update(inout self): print("update method2")
    fn render(inout self): pass

def main():
    var b1 = BaseComponent1()
    var b2 = BaseComponent2()
    var comp_list_entity = Entity(CptList(b1,b2))
    comp_list_entity.update()

from utils import Variant
alias ComponentList = Variant[BaseComponent1,BaseComponent2]
alias CptList = List[ComponentList]

struct Entity:
    var components: CptList

    fn __init__(inout self, components: CptList):
        self.components = components
    
    fn update(inout self):
        for i in range(len(self.components)):
            if self.components[i].isa[BaseComponent1]():
                self.components[i][BaseComponent1].update()
            elif self.components[i].isa[BaseComponent2]():
                self.components[i][BaseComponent2].update()
            #continue elif statements for each additional variant
            
    fn addCpt(inout self, value: ComponentList):
        self.components.append(value)


@value
struct BaseComponent1: # example
    fn __init__(inout self): print("hi!!!!!")

    fn update(inout self): print("update method1")
    fn render(inout self): pass

@value
struct BaseComponent2: # example
    fn __init__(inout self): print("hi2!!!!!")

    fn update(inout self): print("update method2")
    fn render(inout self): pass

def main():
    var b1 = BaseComponent1()
    var b2 = BaseComponent2()
    var comp_list_entity = Entity(CptList(b1,b2))
    comp_list_entity.update()

Unfortunately there is no shortcut currently to blanket apply a method by doing list[x].common_method() even if all the structs within the variant have the exact same method.

18 replies

MModular

•Created by banananas on 9/28/2024 in #questions

Calling methods from list indexes

Think I may be missing what you are trying to do. On mobile right now and it will be a bit before I can write up working code. I think if you could explain the specific use case I might be able to better answer the root of your question

18 replies

MModular

•Created by banananas on 9/28/2024 in #questions

Calling methods from list indexes

It can be, depending on what you're trying to do you may not even need a variant

18 replies

MModular

•Created by banananas on 9/28/2024 in #questions

Calling methods from list indexes

you'll need to have the Variant[types...] as one of the list of types in the original variant

alias my_variant_variant = Variant[Int,String,Variant[Int,String]]
alias list_of_variants = List[my_variant_variant]

def main():
    var v = list_of_variants() 
    v.append(my_variant_variant(1))
    v.append(my_variant_variant(str('hi')))
    v.append(my_variant_variant( Variant[Int,String](str('variant of a variant') )))

    var my_int = v[0][Int] #my_int is of type Int
    var my_string = v[1][String] #my_string is of type String
    var my_var = v[2][Variant[Int,String]] #my_var is of type Variant[Int, String]

    print(my_int) #prints 1
    print(my_string) #prints 'hi'
    print(my_var[String]) #prints 'variant of a variant'

alias my_variant_variant = Variant[Int,String,Variant[Int,String]]
alias list_of_variants = List[my_variant_variant]

def main():
    var v = list_of_variants() 
    v.append(my_variant_variant(1))
    v.append(my_variant_variant(str('hi')))
    v.append(my_variant_variant( Variant[Int,String](str('variant of a variant') )))

    var my_int = v[0][Int] #my_int is of type Int
    var my_string = v[1][String] #my_string is of type String
    var my_var = v[2][Variant[Int,String]] #my_var is of type Variant[Int, String]

    print(my_int) #prints 1
    print(my_string) #prints 'hi'
    print(my_var[String]) #prints 'variant of a variant'

18 replies

MModular

•Created by banananas on 9/28/2024 in #questions

Calling methods from list indexes

Yeah, if I were to guess, the explicit call is for the strict typing and performance reasons

18 replies

MModular

•Created by banananas on 9/28/2024 in #questions

Calling methods from list indexes

Here's the example from the API docs for an example:

from utils import Variant
alias IntOrString = Variant[Int, String]
fn to_string(inout x: IntOrString) -> String:
    if x.isa[String]():
        return x[String][]
    # x.isa[Int]()
    return str(x[Int][])

# They have to be mutable for now, and implement CollectionElement
var an_int = IntOrString(4)
var a_string = IntOrString(String("I'm a string!"))
var who_knows = IntOrString(0)
import random
if random.random_ui64(0, 1):
    who_knows.set[String]("I'm actually a string too!")

print(to_string(an_int))
print(to_string(a_string))
print(to_string(who_knows))

from utils import Variant
alias IntOrString = Variant[Int, String]
fn to_string(inout x: IntOrString) -> String:
    if x.isa[String]():
        return x[String][]
    # x.isa[Int]()
    return str(x[Int][])

# They have to be mutable for now, and implement CollectionElement
var an_int = IntOrString(4)
var a_string = IntOrString(String("I'm a string!"))
var who_knows = IntOrString(0)
import random
if random.random_ui64(0, 1):
    who_knows.set[String]("I'm actually a string too!")

print(to_string(an_int))
print(to_string(a_string))
print(to_string(who_knows))

18 replies

MModular

•Created by banananas on 9/28/2024 in #questions

Calling methods from list indexes

self.components[i][BaseComponent].update()

self.components[i][BaseComponent].update()

Mojo requires you to tell it which of the variant types it is

18 replies

MModular

•Created by Hylke on 9/22/2024 in #questions

How to define nested dict function

Also if you are looking at parsing (or better more fleshed out code) I recommend checking out https://www.modular.com/modverse/modverse-42 specifically Pholmola's project

6 replies

MModular

•Created by Hylke on 9/22/2024 in #questions

How to define nested dict function

Probably not the best way to do what you're looking for but see the 2 examples below. From example you have though, makes me wonder if you want to use a nested dict or just store each type in its own array.

@value
struct Node:
    var dict: Dict[String, Variant[String,Node]]

    fn __setitem__(inout self, key: String, val:Variant[String,Node]):
        self.dict[key] = val

    fn __getitem__(self, key: String) raises -> Variant[String,Node]:
        if key in self.dict:
            return self.dict[key]
        else:
            return Variant[String,Node](str('Does not exist'))

alias str_int = Variant[String,Int,StringLiteral]
@value
struct Node2:
    var dict: Dict[String, Node2]
    var value: str_int

    fn __setitem__(inout self, key: String, n: Node2):
        self.dict[key] = n

    fn __getitem__(self, key: String) raises -> Node2:
        if key in self.dict:
            return self.dict[key]
        else:
            return Node2(Dict[String, Node2](), '')

def main():
    n = Node(Dict[String, Variant[String,Node]]())
    var a1 = Variant[String,Node](str('123'))
    var a2 = Variant[String,Node](str('Pike'))
    var a3 = Variant[String,Node](str('NY'))
    var add = Node(Dict[String, Variant[String,Node]]())
    add['street'] = a1
    add['city'] = a2
    add['state'] = a3
    n['Address'] = add
    print(n['Address'][Node]['street'][String])
    print(n['Address'][Node]['city'][String])
    print(n['Address'][Node]['state'][String])

    n2 = Node2(Dict[String, Node2](), str_int(''))

    n2['user'] = Node2(Dict[String, Node2](), str_int('Allise'))
    print(n2['user'].value[StringLiteral])

    n2['address'] = Node2(Dict[String, Node2](), str_int(''))
    n2['address']['street'] = Node2(Dict[String, Node2](), str_int(123))
    n2['address']['city'] = Node2(Dict[String, Node2](), str_int('Pike'))
    n2['address']['state'] = Node2(Dict[String, Node2](), str_int('NY'))

@value
struct Node:
    var dict: Dict[String, Variant[String,Node]]

    fn __setitem__(inout self, key: String, val:Variant[String,Node]):
        self.dict[key] = val

    fn __getitem__(self, key: String) raises -> Variant[String,Node]:
        if key in self.dict:
            return self.dict[key]
        else:
            return Variant[String,Node](str('Does not exist'))

alias str_int = Variant[String,Int,StringLiteral]
@value
struct Node2:
    var dict: Dict[String, Node2]
    var value: str_int

    fn __setitem__(inout self, key: String, n: Node2):
        self.dict[key] = n

    fn __getitem__(self, key: String) raises -> Node2:
        if key in self.dict:
            return self.dict[key]
        else:
            return Node2(Dict[String, Node2](), '')

def main():
    n = Node(Dict[String, Variant[String,Node]]())
    var a1 = Variant[String,Node](str('123'))
    var a2 = Variant[String,Node](str('Pike'))
    var a3 = Variant[String,Node](str('NY'))
    var add = Node(Dict[String, Variant[String,Node]]())
    add['street'] = a1
    add['city'] = a2
    add['state'] = a3
    n['Address'] = add
    print(n['Address'][Node]['street'][String])
    print(n['Address'][Node]['city'][String])
    print(n['Address'][Node]['state'][String])

    n2 = Node2(Dict[String, Node2](), str_int(''))

    n2['user'] = Node2(Dict[String, Node2](), str_int('Allise'))
    print(n2['user'].value[StringLiteral])

    n2['address'] = Node2(Dict[String, Node2](), str_int(''))
    n2['address']['street'] = Node2(Dict[String, Node2](), str_int(123))
    n2['address']['city'] = Node2(Dict[String, Node2](), str_int('Pike'))
    n2['address']['state'] = Node2(Dict[String, Node2](), str_int('NY'))

6 replies

MModular

•Created by banananas on 9/23/2024 in #questions

"Linking" structs together?

Does the list have to be ordered in relation to other types of objects? Thinking you might get away with struct with a list for each type

44 replies

Gaming

Programming