Python读写文件及文件指针定位

>>> f = open('e://test.txt','w')
>>> a = [1, 2]
>>> f.write(a);
Traceback (most recent call last):
File "<pyshell#13>", line 1, in <module>
f.write(a);
TypeError: write() argument 1 must be str, not list
>>> f.write('hello world');
11
>>> f.close()
>>>

>>> f = open('e://test.txt', 'r')
>>> f.read(5)
'hello'
>>> f.seek(0, 1)
5
>>> f.read()
' world'
>>> f.seek(0, 0)
0
>>> f.read()
'hello world'
>>> f.close()
>>>