##python批量更换后缀名
import os
# 列出当前目录下所有的文件
files = os.listdir('.')
#print('files',files)
for filename in files:
  portion = os.path.splitext(filename)
  # 如果后缀是.dat
  if portion[1] == ".dat": 
    # 重新组合文件名和后缀名
    newname = portion[0] + ".txt"  
    os.rename(filename,newname)

import os
import sys
sys.path.append(r"G:\traindataDAT\ ")
#print(sys.path)
# 列出当前目录下所有的文件
files = os.listdir(r"G:\traindataDAT")
#files = os.listdir('.')
#print('files',files)
for filename in files:
  portion = os.path.splitext(filename)
  # 如果后缀是.txt
  if portion[1] == ".dat": 
    # 重新组合文件名和后缀名
    newname = portion[0] + ".txt"  
    os.rename(filename,newname)

##python批量更换后缀名
import os
import sys
path0=r"G:\testdataTXT"
path1=r"G:\testdataTXT"+'\\'
sys.path.append(path1)
# print(sys.path)
# 列出当前目录下所有的文件
files = os.listdir(path0)
# files = os.listdir('.')
print('files',files)
for filename in files:
  portion = os.path.splitext(filename)
  # 如果后缀是.txt
  if portion[1] == ".dat": 
    # 重新组合文件名和后缀名
    newname = portion[0] + ".txt" 
    filenamedir=path1 +filename
    newnamedir=path1+newname
    # os.rename(filename,newname)
    os.rename(filenamedir,newnamedir)