Python遍历文件夹和读写文件的实现方法

#-*- coding: UTF-8 -*- 

'''
1、读取指定目录下的所有文件
2、读取指定文件，输出文件内容
3、创建一个文件并保存到指定目录
'''
import os

# 遍历指定目录，显示目录下的所有文件名
def eachFile(filepath):
  pathDir = os.listdir(filepath)
  for allDir in pathDir:
    child = os.path.join('%s%s' % (filepath, allDir))
    print child.decode('gbk') # .decode('gbk')是解决中文显示乱码问题

# 读取文件内容并打印
def readFile(filename):
  fopen = open(filename, 'r') # r 代表read
  for eachLine in fopen:
    print "读取到得内容如下：",eachLine
  fopen.close()
  
# 输入多行文字，写入指定文件并保存到指定文件夹
def writeFile(filename):
  fopen = open(filename, 'w')
  print "\r请任意输入多行文字"," ( 输入 .号回车保存)"
  while True:
    aLine = raw_input()
    if aLine != ".":
      fopen.write('%s%s' % (aLine, os.linesep))
    else:
      print "文件已保存!"
      break
  fopen.close()

if __name__ == '__main__':
  filePath = "D:\\FileDemo\\Java\\myJava.txt"
  filePathI = "D:\\FileDemo\\Python\\pt.py"
  filePathC = "C:\\"
  eachFile(filePathC)
  readFile(filePath)
  writeFile(filePathI)