Python:读文件和写文件

Python文件读写示例

最新推荐文章于 2025-06-03 22:04:51 发布

最新推荐文章于 2025-06-03 22:04:51 发布 · 116 阅读

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#python

本文提供了一个使用Python进行文件读写的完整示例，包括创建文件、写入内容及读取显示的功能。通过命令行输入文件名及内容，程序将完成文件的创建与写入，并能读取该文件内容并显示。

1. 写文件

#! /usr/bin/python3 'makeTextFile.py -- create text file' import os def write_file(): "used to write a text file." ls = os.linesep #get filename fname = input("Please input filename:") while True: if os.path.exists(fname): print("Error: '%s' already exists" % fname) fname = input("Please input filename:") else: break #get file conent linesOnScreen all = [] print("\nEnter lines ('.' to quit).\n") while True: entry = input('>') if entry == '.': break else: all.append(entry) try: fobj = open(fname, 'w') except IOError as err: print('file open error: {0}'.format(err)) fobj.writelines(['%s%s' % (x, ls) for x in all]) fobj.close() print('WRITE FILE DONE!') return fname

2. 读文件

#! /usr/bin/python3 'readTextFile.py -- read and display text file.' def read_file(filename): 'used to read a text file.' try: fobj = open(filename, 'r') except IOError as err: print('file open error: {0}'.format(err)) else: for eachLine in fobj: print(eachLine) fobj.close()

3. 主程序

#! /usr/bin/python3 'write_and_read_file.py -- write and read text file.' import makeTextFile import readTextFile if __name__ == '__main__': #wrie file filename = makeTextFile.write_file() #read file readTextFile.read_file(filename)

4.运行结果

Python 3.2.2 (default, Sep 4 2011, 09:51:08) [MSC v.1500 32 bit (Intel)] on winxp-duanyx, Standard >>> Please input filename:d:\testpython.log Enter lines ('.' to quit). >this is a test file. >ok ,let us input . to end the content input. >. WRITE FILE DONE! this is a test file. ok ,let us input . to end the content input. >>>