Method isupper

crates/vm/src/builtins/str.rs:1114–1120

(&self)

    // Return true if all cased characters in the string are uppercase and there is at least one cased character, false otherwise.
    #[pymethod]
    fn isupper(&self) -> bool {
        match self.as_str_kind() {
            PyKindStr::Ascii(s) => s.py_isupper(),
            PyKindStr::Utf8(s) => s.py_isupper(),
            PyKindStr::Wtf8(w) => w.py_isupper(),
        }
    }

    #[pymethod]
    fn splitlines(&self, args: anystr::SplitLinesArgs, vm: &VirtualMachine) -> Vec<PyObjectRef> {