python bmp转jpg

工作中需要把一些bmp图转换为jpg，部分资料是使用opencv，但安装起来不方便，估使用其他方式。

import os.path
from PIL import Image
from io import BytesIO

def scanDir(dirPath: str)->list:
	"""扫描目录"""
	fileList = []
	for top, dirs, nondirs in os.walk(dirPath):
		for item in nondirs:
			if item.split('.)[-1] == 'bmp':
				fileList.append(os.path.join(top, item))
	return fileList

def  bmp2jpg(filePath):
	fileLst = scanDir(filePath)
	for oneFile in fileLst:
		bmp = Image.open(oneFile)
		output_buffer = BytesIO()
		bmp.save(output_buffer,format ='JPEG')
		byte_data = output_buffer.getvalue()
		a = os.path.splitext(oneFile)[0]
		tmpUrl = f'{a}.jpg'
		try:
			with open(tmpUrl, 'wb') as f:
				f.write(byte_data)
		except Exception as e:
			pass