Modular•10mo ago

Bytes-like object when using a python module

Hi there, I'm checking out mojo and was going to make a little IRC client using the basic python socket module, but I ran into an issue when trying to call socket.send which was: a bytes-like object is required, not 'str'. So I tried to get the underlying buffer from the string and got a compile error: argument #1 cannot be converted from 'DynamicVector[SIMD[si8, 1]]' to 'PythonObject' I'm new to mojo and my python is very rusty, but I couldn't find a way to get a bytes-like python object, is there a stdlib function somewhere that I'm missing?

6 Replies

sora•10mo ago

I think what you are looking for is the Python method on str: "string".encode("utf-8").

abiOP•10mo ago

How do I use that method on a mojo String? Since it's a built in python type I'm not sure how to import/use it

sora•10mo ago

from python import Python


fn main() raises:
  var builtins: PythonObject
  try:
    builtins = Python.import_module("builtins")
  except PythonError:
    return print("import error")
  var s = String("test")
  print(builtins.str(s).encode("utf-8"))

from python import Python


fn main() raises:
  var builtins: PythonObject
  try:
    builtins = Python.import_module("builtins")
  except PythonError:
    return print("import error")
  var s = String("test")
  print(builtins.str(s).encode("utf-8"))

abiOP•10mo ago

Oh it's an actual module called builtins 🤦‍♀️ This did work! Thanks for sharing your brainpower with me 🙂

sora•10mo ago

It's actually the Python module builtins.

abiOP•10mo ago

Yeah, I was looking in the python docs but I was on a page talking about the builtins stuff but since it was talking about things that are automatically imported to python I didn't realize that it's in a literal module called builtins

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Bytes-like object when using a python module