From 756a91e2de8457d547d9661ea2998f3dcdd85e96 Mon Sep 17 00:00:00 2001
From: Can <daikank@163.com>
Date: Fri, 3 Dec 2021 20:37:45 +0800
Subject: [PATCH] Update `plot_lr_scheduler()` (#5864)

shallow copy modify originals
---
 utils/plots.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/utils/plots.py b/utils/plots.py
index 69037ee9af70..5742d050fdf5 100644
--- a/utils/plots.py
+++ b/utils/plots.py
@@ -5,7 +5,7 @@
 
 import math
 import os
-from copy import copy
+from copy import deepcopy
 from pathlib import Path
 
 import cv2
@@ -243,7 +243,7 @@ def plot_images(images, targets, paths=None, fname='images.jpg', names=None, max
 
 def plot_lr_scheduler(optimizer, scheduler, epochs=300, save_dir=''):
     # Plot LR simulating training for full epochs
-    optimizer, scheduler = copy(optimizer), copy(scheduler)  # do not modify originals
+    optimizer, scheduler = deepcopy(optimizer), deepcopy(scheduler)  # do not modify originals
     y = []
     for _ in range(epochs):
         scheduler.step()