Method _lookup_text_encoding

crates/vm/src/codecs.rs:271–285

(
        &self,
        encoding: &str,
        generic_func: &str,
        vm: &VirtualMachine,
    )

    }

    fn _lookup_text_encoding(
        &self,
        encoding: &str,
        generic_func: &str,
        vm: &VirtualMachine,
    ) -> PyResult<PyCodec> {
        let codec = self.lookup(encoding, vm)?;
        if codec.is_text_codec(vm)? {
            Ok(codec)
        } else {
            Err(vm.new_lookup_error(format!(
                "'{encoding}' is not a text encoding; use {generic_func} to handle arbitrary codecs"
            )))
        }
    }

    pub fn forget(&self, encoding: &str) -> Option<PyCodec> {
        let encoding = normalize_encoding_name(encoding);