Python 2.7.3 (default, Apr 10 2012, 23:24:47) [MSC v.1500 64 bit (AMD64)] on win32
Type "copyright", "credits" or "license()" for more information.
>>> import sys
>>> a=sys.stdin.read()
Traceback (most recent call last):
  File "<pyshell#1>", line 1, in <module>
    a=sys.stdin.read()
AttributeError: read
>>>

Python 2.7.3 (default, Sep 26 2013, 20:03:06) 
[GCC 4.6.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> a=sys.stdin.read()
gbfgb
fgbdfbdf
>>>