Python中操作文件之write()方法的使用教程
发布时间:2020-12-16 20:03:36 所属栏目:Python 来源:网络整理
导读:write()方法把字符串str写入文件。没有返回值。由于缓冲,字符串可能不实际显示文件,直到flush()或close()方法被调用。 语法 以下是write()方法的语法: fileObject.write( str ) 参数 str -- 这是要被写入的文件中的字符串。 返回值 此方法不返回任何值。
write()方法把字符串str写入文件。没有返回值。由于缓冲,字符串可能不实际显示文件,直到flush()或close()方法被调用。 以下是write()方法的语法: fileObject.write( str ) 参数
返回值 此方法不返回任何值。 下面的例子显示write()方法的使用。 #!/usr/bin/python # Open a file in write mode fo = open("foo.txt","rw+") print "Name of the file: ",fo.name # Assuming file has following 5 lines # This is 1st line # This is 2nd line # This is 3rd line # This is 4th line # This is 5th line str = "This is 6th line" # Write a line at the end of the file. fo.seek(0,2) line = fo.write( str ) # Now read complete file from beginning. fo.seek(0,0) for index in range(6): line = fo.next() print "Line No %d - %s" % (index,line) # Close opend file fo.close() 当我们运行上面的程序,它会产生以下结果: Name of the file: foo.txt Line No 0 - This is 1st line Line No 1 - This is 2nd line Line No 2 - This is 3rd line Line No 3 - This is 4th line Line No 4 - This is 5th line Line No 5 - This is 6th line
(编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |