ファイル名の一括変更
import os
path = 'C:/Users/your-name/OneDrive/デスクトップ/全身/'
list = os.listdir(path)
for i in range(len(list)):
old_filename = os.path.join(path + list[i])
new_filename = os.path.join(path + os.path.splitext(os.path.basename(list[i]))[0] + '_下着_全身.png')
os.rename(old_filename, new_filename)