Method py_zfill

crates/vm/src/anystr.rs:397–400

(&self, width: isize)

    }

    fn py_zfill(&self, width: isize) -> Vec<u8> {
        let width = width.to_usize().unwrap_or(0);
        rustpython_common::str::zfill(self.as_bytes(), width)
    }

    // Unified form of CPython functions:
    //  _Py_bytes_islower