diff --git a/vm/src/function/buffer.rs b/vm/src/function/buffer.rs
@@ -2,7 +2,8 @@ use crate::{
    builtins::{PyStr, PyStrRef},
    common::borrow::{BorrowedValue, BorrowedValueMut},
    protocol::PyBuffer,
-    PyObject, PyObjectRef, PyResult, TryFromBorrowedObject, TryFromObject, VirtualMachine,
};

// Python/getargs.c
@@ -57,6 +58,10 @@ impl ArgBytesLike {
    pub fn is_empty(&self) -> bool {
        self.len() == 0
    }
}

impl From<ArgBytesLike> for PyBuffer {
@@ -126,6 +131,15 @@ pub enum ArgStrOrBytesLike {
    Str(PyStrRef),
}

impl TryFromObject for ArgStrOrBytesLike {
    fn try_from_object(vm: &VirtualMachine, obj: PyObjectRef) -> PyResult<Self> {
        obj.downcast()