add bytes/byterray title

vm/src/obj/objbytearray.rs

@@ -364,6 +364,7 @@ impl PyByteArrayRef {
             .push(x.as_bigint().byte_or(vm)?);
         Ok(())
     }
+
     #[pymethod(name = "pop")]
     fn pop(self, vm: &VirtualMachine) -> PyResult<u8> {
         let bytes = &mut self.inner.borrow_mut().elements;
@@ -371,6 +372,11 @@ impl PyByteArrayRef {
             .pop()
             .ok_or_else(|| vm.new_index_error("pop from empty bytearray".to_string()))
     }
+
+    #[pymethod(name = "title")]
+    fn title(self, vm: &VirtualMachine) -> PyResult {
+        Ok(vm.ctx.new_bytearray(self.inner.borrow().title()))
+    }
 }
 
 // fn set_value(obj: &PyObjectRef, value: Vec<u8>) {

vm/src/obj/objbyteinner.rs

@@ -975,6 +975,30 @@ impl PyByteInner {
 
         Ok(res)
     }
+
+    pub fn title(&self) -> Vec<u8> {
+        let mut res = vec![];
+        let mut spaced = true;
+
+        for i in self.elements.iter() {
+            match i {
+                65..=90 | 97..=122 => {
+                    if spaced {
+                        res.push(i.to_ascii_uppercase());
+                        spaced = false
+                    } else {
+                        res.push(i.to_ascii_lowercase());
+                    }
+                }
+                _ => {
+                    res.push(*i);
+                    spaced = true
+                }
+            }
+        }
+
+        res
+    }
 }
 
 pub fn try_as_byte(obj: &PyObjectRef) -> Option<Vec<u8>> {

vm/src/obj/objbytes.rs

@@ -402,6 +402,11 @@ impl PyBytesRef {
     ) -> PyResult {
         Ok(vm.ctx.new_bytes(self.inner.replace(old, new, count)?))
     }
+
+    #[pymethod(name = "title")]
+    fn title(self, vm: &VirtualMachine) -> PyResult {
+        Ok(vm.ctx.new_bytes(self.inner.title()))
+    }
 }
 
 #[pyclass]