import os import sys import codecs import chardet def convert(filename,out_enc="utf-8"):     try:         content=codecs.open(filename,'rb').read()         source_encoding=chardet.detect(content)['encoding']         content=content.decode(source_encoding).encode(out_enc)        content=content.replace(b'\r\n',b'\n')         codecs.open(filename,'wb').write(content)         print("Encoding file :{0}, convert from {1} to {2}".format(filename,source_encoding,out_enc))    except IOError as err:         print("I/O error:{0}".format(err))   def explore(dir):     suff_list=['.py','.txt','.sql']    for root,dirs,files in os.walk(dir):         for file in files:             suffix=os.path.splitext(file)[-1]            if suffix.lower() in suff_list:                 path=os.path.join(root,file)                 convert(path)     if __name__=="__main__":     # dir="./test"    dir=os.getcwd()    if len(sys.argv)==2:        dir=sys.argv[1]    explore(dir)