python gbk 相互转换 utf8

def gbkfileToUtf8(inFilePath,outFilePath):
    with  open(inFilePath, 'rb') as f1:
        a = f1.read()
        b = a.decode('gbk', 'ignore')
        with open(outFilePath, 'w', encoding='utf8') as f2:
            f2.write(b)
        print("转化完成")

def utf8fileToGbk(inFilePath,outFilePath):
    with  open(inFilePath, 'rb') as f1:
        a = f1.read()
        b = a.decode('utf8', 'ignore')
        with open(outFilePath, 'w', encoding='gbk') as f2:
            f2.write(b)
        print("转化完成")