Python字典文件的上机实例

C:\>python
Python 2.5.1 (r251:54863, Apr 18 2007, 08:51:08) [MSC v.1310 32 bit (Intel)] on
win32
Type "help", "copyright", "credits" or "license" for more information.
>>> d2={'Name':'Saromman','QQ':'45185852','Mail':'saromman@371.net'}
>>> output=open('test.txt','w')  #写入文件
>>> for x in d2.keys():
...  output.write(x+':'+d2[x]+'\n')

>>> output.close()
>>> input=open('test.txt','r')   #以读方式打开文件
>>> s=input.readline()
>>> s
'QQ:45185852\n'
>>> print s
QQ:45185852

>>> s=input.readline()
>>> print s
Mail:saromman@371.net

>>> s=input.readline()
>>> print s
Name:Saromman

>>> s=input.read()
>>> s
'Q:45185852\nMail:saromman@371.net\nName:Saromman\n'
>>> print s
Q:45185852
Mail:saromman@371.net
Name:Saromman

>>> s=input.read()
>>> s
''
>>> input.seek(0)
>>> s=input.readline()
>>> s
'QQ:45185852\n'
>>> print s
QQ:45185852

>>> s=input.readline()
>>> s
'Mail:saromman@371.net\n'
>>> s=input.readline()
>>> s
'Name:Saromman\n'
>>> s=input.readline()
>>> s
''