Mahmoud Abduljawad Posts - Answer Overflow

Mahmoud Abduljawad

•Created by Mahmoud Abduljawad on 9/17/2023 in #questions

How to store PythonObject in DynamicVector?

I'm trying the following:

let module = Python.import_module("my_module")
let dv = DynamicVector[PythonObject]()
let result = my_module.my_func()
dv.push_back(result)

let module = Python.import_module("my_module")
let dv = DynamicVector[PythonObject]()
let result = my_module.my_func()
dv.push_back(result)

And getting:

cannot bind generic !mlirtype to memory-only type 'PythonObject'

cannot bind generic !mlirtype to memory-only type 'PythonObject'

I tried different combinations, but as long the type is non-imperative type, this won't work. What is a workaround for this?

6 replies

MModular

•Created by Mahmoud Abduljawad on 9/9/2023 in #questions

How to pass Mojo function to Python in Python interop?

The question is how to pass Mojo function to Python in Python interop? For example,

# This is main.mojo
from python.python import Python

def callback():
    return 5

def main():
  Python.add_to_path(".")
  let test_module = Python.import_module("lib")
  print(test_module.test_interop(callback))

# This is main.mojo
from python.python import Python

def callback():
    return 5

def main():
  Python.add_to_path(".")
  let test_module = Python.import_module("lib")
  print(test_module.test_interop(callback))

# This is lib.py
def test_interop(func):
    return func()

# This is lib.py
def test_interop(func):
    return func()

If I run this, it will show the following message:

$ main.mojo
main.mojo:9:33: error: invalid call to '__call__': argument #1 cannot be converted from 'fn() raises -> object' to 'PythonObject'
  print(test_module.test_interop(callback))
        ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~
main.mojo:1:1: note: function declared here
from python.python import Python
^
mojo: error: failed to parse the provided Mojo

$ main.mojo
main.mojo:9:33: error: invalid call to '__call__': argument #1 cannot be converted from 'fn() raises -> object' to 'PythonObject'
  print(test_module.test_interop(callback))
        ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~
main.mojo:1:1: note: function declared here
from python.python import Python
^
mojo: error: failed to parse the provided Mojo

Question originally posted by HKTonyLee on SO: https://stackoverflow.com/questions/77063677/how-to-pass-mojo-function-to-python-in-python-interop

13 replies

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