Python3
Windows电脑
打开电脑运行，输入‘cmd’进入命令行窗口输入‘python’
在python交互命令行输入：>>> file = open(r'c:\x.txt','r')>>> cont = file.read()>>> print (cont)dddddddddddddddfffffffggggg>>>read是读取全部内容
继续在python交互命令行输入：>>> file = open(r'c:\x.txt','r')>>> cont = file.read()>>> print (cont)dddddddddddddddfffffffggggg>>> file.seek(0)0>>> print (file.tell())0>>> line = file.readline()>>> print(line)dddddddddddddd>>>将文件移动到开头，readline仅仅是读取第一行内容
继续在python交互命令行输入：>>> file = open(r'c:\x.txt','r')>>> cont = file.read()>>> print (cont)dddddddddddddddfffffffggggg>>> file.seek(0)0>>> print (file.tell())0>>> line = file.readline()>>> print(line)dddddddddddddd>>> lines = file.readlines()>>> print (lines)['dfffffff\n', 'ggggg']readlines()将剩余内容读入列表。
也可以通过遍历方式打印列表：for l in lines: print(l)
注意文件使用完一定要关闭：file.close()