Method startswith

crates/vm/src/builtins/str.rs:913–930

(
        &self,
        options: anystr::StartsEndsWithArgs,
        vm: &VirtualMachine,
    )

    #[pymethod]
    fn startswith(
        &self,
        options: anystr::StartsEndsWithArgs,
        vm: &VirtualMachine,
    ) -> PyResult<bool> {
        let (affix, substr) =
            match options.prepare(self.as_wtf8(), self.len(), |s, r| s.get_chars(r)) {
                Some(x) => x,
                None => return Ok(false),
            };
        substr.py_starts_ends_with(
            &affix,
            "startswith",
            "str",
            |s, x: &Py<Self>| s.starts_with(x.as_wtf8()),
            vm,
        )
    }

    #[pymethod]
    fn removeprefix(&self, pref: PyStrRef) -> Wtf8Buf {