[Python] TypeError: Can't convert object to 'str' for 'filename'

I want to create imgs variable to load all the images in "./input/hubmap-organ-segmentation/train_images/" folder. My code raised TypeError: Can't convert object to 'str' for 'filename' error.

import os
import glob
import pandas as pd
import cv2

BASE_PATH = "./input/hubmap-organ-segmentation/"
df = pd.read_csv(os.path.join(BASE_PATH, "train.csv"))

all_image_files = glob.glob(os.path.join(BASE_PATH, "train_images", "**", "*.tiff"), recursive=True)
train_img_map = {int(x[:-5].rsplit("/", 1)[-1]):x for x in all_image_files}
df.insert(3, "img_path", image_ids.map(train_img_map))

imgs = [cv2.imread(img_path)[..., ::-1] for img_path in df.img_path.values]


Traceback:

---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
Input In [132], in <cell line: 38>()
37 ftu_crop_map = {}
38 for _organ in ORGANS:
39 #sub_df = df[df.organ==_organ].sample(N_EX)
---> 40 imgs = [cv2.imread(img_path)[..., ::-1] for img_path in df.img_path.values]

Input In [132], in <listcomp>(.0)
37 ftu_crop_map = {}
38 for _organ in ORGANS:
39 #sub_df = df[df.organ==_organ].sample(N_EX)
---> 40 imgs = [cv2.imread(img_path)[..., ::-1] for img_path in df.img_path.values]

TypeError: Can't convert object to 'str' for 'filename'


Example of img_path:

df.img_path[0]
'./input/hubmap-organ-segmentation/train_images/10044.tiff'

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