Python3读取文件常用方法实例分析
本文实例讲述了Python3读取文件常用方法。分享给大家供大家参考。具体如下:
''''' CreatedonDec17,2012 读取文件 @author:liury_lab ''' #最方便的方法是一次性读取文件中的所有内容放到一个大字符串中: all_the_text=open('d:/text.txt').read() print(all_the_text) all_the_data=open('d:/data.txt','rb').read() print(all_the_data) #更规范的方法 file_object=open('d:/text.txt') try: all_the_text=file_object.read() print(all_the_text) finally: file_object.close() #下面的方法每行后面有‘\n' file_object=open('d:/text.txt') try: all_the_text=file_object.readlines() print(all_the_text) finally: file_object.close() #三句都可将末尾的'\n'去掉 file_object=open('d:/text.txt') try: #all_the_text=file_object.read().splitlines() #all_the_text=file_object.read().split('\n') all_the_text=[L.rstrip('\n')forLinfile_object] print(all_the_text) finally: file_object.close() #逐行读 file_object=open('d:/text.txt') try: forlineinfile_object: print(line,end='') finally: file_object.close() #每次读取文件的一部分 defread_file_by_chunks(file_name,chunk_size=100): file_object=open(file_name,'rb') whileTrue: chunk=file_object.read(chunk_size) ifnotchunk: break yieldchunk file_object.close() forchunkinread_file_by_chunks('d:/data.txt',4): print(chunk)
输出如下:
hellopython helloworld b'ABCDEFG\r\nHELLO\r\nhello' hellopython helloworld ['hellopython\n','helloworld'] ['hellopython','helloworld'] hellopython helloworldb'ABCD' b'EFG\r' b'\nHEL' b'LO\r\n' b'hell' b'o'
希望本文所述对大家的Python程序设计有所帮助。